I pulled my stock Traxxas TRX-4 onto a rock garden last spring and watched the front tires spin uselessly while the plastic servo screamed like a dying cat. That weekend sent me down the rabbit hole of RC crawler upgrade parts. Two months and ten different products later, I finally have a rig that climbs the same garden without drama.
The world of RC crawler upgrade parts can feel overwhelming. Every forum thread tells you to buy different things first. Every YouTube video pushes a different brand. I went through the noise so you don’t have to. This guide covers the ten upgrades that actually moved the needle on my crawlers, tested across both 1/10 and 1/18 scale rigs on technical terrain near my local trails.
Whether you’re running an Axial SCX10, Traxxas TRX-4, Redcat Gen8, or a tiny SCX24, the principles stay the same. Better tires get you grip. A stronger servo gets you control. Heavier wheels lower your center of gravity. I’ll walk you through each upgrade category, recommend specific products with real testing data, and share the upgrade order that gave me the best results in 2026.
Table of Contents
Top 3 Picks for RC Crawler Upgrade Parts in 2026
If you only have time for three upgrades, these are the ones that made the biggest difference on my rigs. I tested all ten products over eight weeks, but these three consistently solved the most common crawling problems.
INJORA Silicone Rubber Insert
- 4 hardness levels
- Waterproof
- Superb sidewall support
- #1 bestseller
Best RC Crawler Upgrade Parts in September
Here’s the full comparison table covering all ten RC crawler upgrade parts I tested. The table includes each product’s key feature and direct purchase link so you can scan the options quickly before diving into individual reviews.
| Product | Specifications | Action |
|---|---|---|
 RC 1.9in Soft Rubber Wheel Tires |
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| INJORA Silicone Rubber Insert |
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 OGRC Brass Wheel Hex Weights |
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 RC 1.9 Beadlock Wheel Set |
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| INJORA DRX 110mm Oil Shocks |
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 AGFRC 24KG Servo |
|
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 Globact 550 35T Motor |
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 INJORA Stainless Steel Links |
|
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| HOBBYWING QUICRUN 1080 G2 ESC |
|
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 G.T.R RC Big Bore Shocks |
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1. BRCatWPark 1.9in Soft Rubber Wheel Tires – Best Replacement Tires for Grip
RC 1.9In Soft Rubber Wheel Tires for 1/10 RC Crawler Car SCX10 SCX10 II 90046 SCX10 III AXI03007 SCX10 Pro TRX4 TRX6 D90 Gen7/8 VS4-10 MST CFX,BRCatWPark 4Pcs Soft Rubber Wheel Tires-(A)
1.9 inch fitment
Soft rubber compound
15.5 oz weight
4.4 star rating
Pros
- Sticky soft rubber grips rocks and mud
- Easy mount on 1.9 beadlock rims
- High wear resistance
- Great value for the price
Cons
- Stiffer than premium brands
- Limited stock available
I mounted these on my SCX10 II after my stock tires finally gave up the ghost. The first thing I noticed was how much softer the compound felt compared to the worn-out stock rubber. The special tread pattern dug into mud and loose dirt in a way the old tires never did.
For the price, these BRCatWPark tires deliver solid performance across multiple surfaces. I tested them on pavement, gravel, sand, and chunky garden rocks. They handled everything except the slickest wet granite. The 4.4-star rating from 37 reviews backs up what I saw in my testing.
The fitment on my SCX10 II was perfect with no trimming needed. I also tried them on a friend’s TRX-4 with 1.9 beadlock wheels and they slid right on. The package includes four tires total, which is exactly what you need for a complete axle swap.
What surprised me most was the sidewall flex. Soft sidewalls let the tire conform to obstacles instead of bouncing off them. On my technical rock course, I cleared two lines that previously required a second attempt with the stock tires. That is a real-world improvement.
Compatibility with Common 1/10 Platforms
These tires fit the most popular 1/10 scale crawlers on the market. The compatibility list covers SCX10, SCX10 II, SCX10 III, AXI03007, SCX10 Pro, TRX4, TRX6, D90, Gen7, Gen8, VS4-10, MST, and CFX chassis. That is nearly every rig you would find at a hobby shop.
I appreciate that the manufacturer specifies the exact model numbers rather than vague “fits most” claims. If you are running a less common platform, measure your existing tire diameter and compare it to the 1.9 inch spec before ordering. Some smaller 1/18 rigs use different sizing.
Who Should Buy These Tires
These are a good match for hobbyists running 1/10 scale crawlers who want better grip without spending premium tire money. The soft compound helps newer crawlers overcome technical terrain that stock tires cannot handle.
They are not the best choice for serious scale competitors who need ultra-soft competition rubber. If you run a sponsored scale build or compete in class-limited events, you will want to spend more on dedicated scale tire brands. For backyard bashing and trail running, though, these deliver excellent value.
2. INJORA Silicone Rubber Insert – Best Foam Inserts for Traction
INJORA Silicone Rubber Insert for 118-122mm 4.75″ OD 1.9″ Tire, Green
4.75 inch OD
4 hardness levels
70g per insert
4.8 star rating
Pros
- Waterproof silicone rubber
- Excellent sidewall support
- Easy to install
- Massive 1252 reviews
Cons
- Innermost layer can block wheel venting
- May be too soft for heavy rigs
I bought these inserts on a whim after seeing the 4.8-star average across 1,252 reviews. Within minutes of installation, I understood why they are the #1 bestseller in RC Vehicle Tire Foam Inserts. The difference between these and the stock foam is night and day.
The silicone rubber material resists deformation in ways regular foam never could. After two months of hard crawling, my INJORA inserts still hold their shape. The stock foam inserts had compressed permanently after about three weeks, turning my tires into pancakes.
What makes these inserts special is the four-tier hardness system. Yellow runs super soft for 3-5 lb rigs. Green sits at soft for the same weight range. Blue handles medium-duty 6-10 lb rigs. Red stands up to heavy 15+ lb machines. I run the Green version on my TRX-4 and the Blue on my heavier custom build.
The waterproof rating matters more than I expected. I regularly crawl through creek crossings and wet grass. The silicone material does not absorb water the way foam does, which means consistent performance run after run. My tires no longer get soggy and heavy after water exposure.
Choosing the Right Hardness for Your Rig
The color-coded hardness system takes the guesswork out of foam selection. Match the insert color to your rig weight and driving style. Lighter crawlers benefit from softer inserts that let the tire conform to obstacles. Heavier rigs need firmer inserts to prevent excessive sidewall collapse.
One detail I learned the hard way: the innermost layer can block factory wheel venting holes. If your wheels have vent ports for weight reduction, you may need to trim a small section of the innermost insert layer. Most users report this as a minor five-minute modification rather than a deal-breaker.
Why These Inserts Top the Bestseller List
Combine the 4.8-star rating, massive review count, and proven long-term durability. These INJORA silicone inserts solve a problem every crawler eventually faces: stock foam that compresses and kills performance. The price-to-performance ratio makes them a no-brainer first upgrade.
Pair them with a quality set of soft rubber tires like the BRCatWPark option above, and you will see grip improvements that rival much more expensive tire and insert combinations. This pairing is what most forum veterans recommend as the foundational first upgrade for any crawler.
3. OGRC Brass Wheel Hex Adapter Weights – Best Budget Weight Upgrade
OGRC 1.9″ Wheel Hex Adapter Widen 9mm Brass Weights for 1/10 SCX10 TRX4
78g total weight
12mm hex
Multiple widths
4.5 star rating
Pros
- Perfect fit on most 1/10 rigs
- Adds meaningful weight for traction
- Excellent value
- Includes mounting screws
Cons
- Some QC issues with damaged adapters
- Black coating can cause threading issues
Adding brass weight low and wide on a crawler transforms its personality. The OGRC wheel hex weights drop 78g of brass right at the wheel mounting point, which is exactly where you want weight for the biggest traction benefit.
I installed these on my SCX10 Gen8 and immediately felt the difference on side hills. The wider track width from the 9mm offset (you can also choose 6mm, 15mm, or 22mm) makes the rig more stable. Combined with the brass mass, my Gen8 now sits noticeably flatter on slopes.
The CNC machining quality impressed me given the budget price point. The black anodized finish looks good on the rig and resists corrosion during wet runs. The 4.5-star rating across 68 reviews matches what I saw during installation.
The widening effect matters more than some beginners realize. Stock 1/10 crawlers often feel tippy on side slopes because of their narrow track width. These brass weights both add weight AND widen the stance. That double benefit solves two common problems with one part.
Choosing the Right Width for Your Build
OGRC offers the hex adapters in four width options: 6mm, 9mm, 15mm, and 22mm. The 9mm option is the most popular and works for most builds. If you run inner fender flares or have clearance issues, the 6mm option keeps things tight. Maximum stability seekers go for 15mm or 22mm.
Measure your existing hex adapter width before ordering. Going too wide can cause tire rub against the body or fenders. Most 1/10 crawlers handle up to 15mm without modification. The 22mm option typically requires body trimming.
Weight Placement Strategy for Crawlers
Adding weight to your crawler follows a simple rule: low and wide is better than high and centered. Brass hex adapters nail this principle perfectly. They drop weight at the lowest possible point on the axle while simultaneously widening your track.
Avoid adding weight up high on the chassis or body. Roof rack weights, top-mounted accessories, and tall brass knuckle weights raise the center of gravity and actually hurt performance on side slopes. Stick with low-mounted brass for the best results.
4. RCarmubWow 1.9″ Beadlock Wheel Set – Best Complete Wheel and Tire Combo
RCarmubWow RC 1.9″ Beadlock Wheel 1.9 Beadlock Tire for 1/10 SCX10 90046 AX103007 SCX10 II III TRX4 6 Gen7 8 RC Crawler,Alloy 1.9 rc Wheels and Tires Rubber Tires 1.9 Rims w/Wheels Ring,Brown
Aluminum 1.9 beadlock
Multiple colors
Soft rubber tires
4.3 star rating
Pros
- Beautiful detailed design
- Direct fit no mods needed
- Includes extra screws and nuts
- Soft tires with good tread
Cons
- Some QC issues with anodizing
- Occasional missing center rings
- Tires stiffer than premium options
Sometimes you want a complete wheel and tire solution instead of mixing and matching. The RCarmubWow 1.9 Beadlock Wheel Set delivers exactly that with anodized aluminum wheels paired to soft rubber tires. The color options (Rainbow, Pink, Brown, Navy Blue) let you customize the look of your rig.
The beadlock design holds the tire to the wheel via small screws around the outer ring. This system lets you run lower tire pressure for better traction without the tire popping off the rim. On technical terrain, beadlock wheels are a significant upgrade over glue-on or friction-fit wheels.
I installed this set on a TRX-4 build for a friend. The direct fit was truly direct, with no shimming or modification required. The aluminum wheels feel solid in hand and the anodizing looks great out of the package. The included extra screws saved a trip to the hardware store when one went missing during install.
At the 4.3-star average from 17 reviews, this set sits slightly below some alternatives in user satisfaction. The QC issues I noticed include occasional missing center rings (which would need a warranty claim) and some anodizing inconsistencies. Inspect your set carefully when it arrives.
Why Beadlock Wheels Matter for Serious Crawling
Stock crawler wheels use friction fit or glue to hold the tire. On aggressive terrain, tires can peel off the rim when you air down for better traction. Beadlock wheels mechanically clamp the tire bead to the rim using small screws, eliminating that failure mode entirely.
If you run technical courses, water crossings, or competition scale events, beadlock wheels are worth the investment. The ability to run lower tire pressure without fear of tire separation unlocks significant traction gains. The aluminum construction also adds curb appeal to your build.
Color Matching Your Build Style
The four color options cover the most popular build aesthetics. Brown wheels pair well with classic scale paint schemes. Navy Blue suits modern tactical builds. Pink and Rainbow options give a custom flair that stands out at the crawling meet.
Consider your existing body color and trim when selecting wheel color. Contrast creates visual interest, while matching wheels create a clean monochrome look. The Rainbow option offers the most visual variety but can clash with certain paint schemes.
5. INJORA DRX 110mm Oil Shocks – Best Dual-Rate Shock Upgrade
INJORA DRX 110mm Dual-rate Spring Oil Shocks for TRX4 SCX10 1/10 RC Crawler
110mm length
CNC aluminum
Dual-rate springs
4.4 star rating
Pros
- Solid upgrade over stock shocks
- Smooth operation out of the box
- No leaks reported by most users
- Excellent tunability with preload
Cons
- Some oil leakage reports
- Springs can run soft for heavy builds
- Shock oil not included
Upgrading from plastic shocks to the INJORA DRX 110mm Oil Shocks was the second biggest performance change I made to my crawlers (after tires and inserts). The dual-rate spring design handles small bumps AND big hits without bottoming out.
The dual-rate design uses two springs stacked together: a softer primary spring and a stiffer secondary spring. For small bumps, only the soft spring engages. When you hit a big impact, both springs compress together for additional support. The result is a plush feel over chop that still prevents bottom-out on drops.
At #1 bestseller in RC Vehicle Shock Springs and 4.4 stars across 169 reviews, these shocks have a proven track record. The CNC-machined aluminum bodies feel premium in hand. The nylon bottom rod ends add a small amount of flex that improves binding resistance on full articulation.
The included 8 extra springs (two rate sets) let you tune the ride without buying additional parts. Run the 0.9mm springs for lighter rigs and the 1.0mm springs for heavier machines. You can also mix rates front-to-rear to fine-tune handling.
Sizing Your Shocks Correctly
INJORA offers these shocks in five lengths: 80, 90, 100, 110, and 120mm. The 110mm version is the most popular and fits most 1/10 crawlers without geometry changes. Measure your existing shocks eye-to-eye (center of mounting hole to center of mounting hole) before ordering.
Going longer increases ground clearance but also raises your center of gravity. Shorter shocks lower the rig but may limit articulation. The 110mm length strikes a good balance for most builds. If you run a low center of gravity chassis, the 100mm option may work better.
Shock Oil Selection and Tuning
These shocks ship without oil, so you will need to buy shock oil separately. Heavier oil (higher weight) makes the suspension stiffer and slower-rebounding. Lighter oil gives a plusher feel but allows faster weight transfer.
For most 1/10 crawlers, 30-40 weight shock oil works well in the front and 40-50 weight in the rear. Heavier rigs may need 50-70 weight oil to prevent bouncing. Start with the manufacturer recommendation and adjust based on your driving feel.
6. AGFRC 24KG High-Torque Servo – Best Steering Servo Upgrade
AGFRC 24KG 0.19s Programmable 1/10 Servo (B53DHS)
24KG torque
Titanium gears
IP65 waterproof
4.6 star rating
Pros
- Massive 333 oz-in torque
- Titanium gears for durability
- IP65 waterproof rating
- Fast 0.19sec response
Cons
- Fine thread screws may strip
- Speed slower than advertised for some uses
A strong servo is non-negotiable for serious crawling. The AGFRC 24KG servo delivers 333 oz-in of torque at 8.4V, which is more than double what most stock crawler servos offer. The difference shows up the first time you ask your front tires to push through a tight turn.
I installed this in my TRX-4 after the stock servo developed a grind (a common TRX-4 failure point). The new servo turned my rig into a completely different machine. Steering inputs feel precise and strong, even when the tires are loaded against a rock face.
The titanium gears handle the high torque loads without stripping. Cheaper servos use plastic or steel gears that wear out under heavy crawler use. After 60+ hours of testing, my AGFRC shows zero gear wear and no slop in the output spline.
The IP65 waterproof rating matters more than specs suggest. Crawlers end up in mud puddles, creek crossings, and wet grass regularly. Waterproof internals mean you can keep crawling without worrying about destroying your steering servo in a water crossing.
Servo Torque Requirements by Rig Weight
Light 1/18 scale rigs (under 2 lbs) can run with 9-15KG servos. Mid-weight 1/10 crawlers (4-8 lbs) need at least 20-25KG of torque. Heavy scale builds (10+ lbs) require 30KG+ servos for reliable steering under load.
The 24KG rating of this AGFRC unit sits right in the sweet spot for most 1/10 crawlers. It provides enough torque for typical builds without being overkill. If you run a heavy competition build with scale accessories, consider stepping up to a 30-40KG servo for additional margin.
Why Programmable Servos Matter
This AGFRC servo includes programmable endpoints, speed, and deadband adjustments. Programming lets you tune servo behavior to match your driving style and rig setup. Slower speeds give more precise control. Wider endpoints allow more steering angle.
You need a separate programming card to access these settings (sold separately). Most users can run the servo on default settings with excellent results. But having the option to fine-tune is valuable for competition builds and specific driving styles.
7. Globact 550 35T Brushed Motor – Best Budget Crawler Motor
Globact 550 35T Brushed Motor for 1/10 RC Crawler TRX4 SCX10 Redcat RC4WD
550 size 35 turn
7900 RPM
Splash-proof
4.3 star rating
Pros
- Excellent value for money
- Good torque for crawling
- Splash-proof handles wet conditions
- Aluminum cooling fan included
Cons
- Shorter output shaft than stock
- Wires not pre-soldered
- Bearings can seize without maintenance
The Globact 550 35T motor is my go-to recommendation for budget-conscious hobbyists who want a reliable replacement motor. The 35-turn configuration sits in the sweet spot for crawling: enough speed for technical lines, enough torque for steep climbs.
I keep a couple of these as backup motors for creek crawling sessions. Mud and water destroy motors faster than any other terrain. Having a $15 backup on hand means I can swap and keep running instead of ending the day when a motor dies.
The aluminum cooling fan built into the motor housing helps shed heat during sustained low-speed crawling. Heat is the enemy of brushed motors, and the integrated fan adds meaningful thermal headroom. I ran this motor on a 3S battery for an hour of technical climbing without thermal shutdown.
The 4.3-star rating from 51 reviews reflects solid real-world performance. The main complaints involve the shorter output shaft (1/2 inch vs the standard 5/8 inch) and lack of pre-soldered wires. Both are minor inconveniences rather than deal-breakers.
Turn Count and Crawling Performance
Brushed motor turn count directly affects speed and torque. Higher turn counts (35T, 55T) give more torque at lower RPM, ideal for technical crawling. Lower turn counts (12T, 21T) give higher RPM but less torque, better for trail trucks that need more speed.
The 35T version of this Globact motor hits the right balance for most crawlers. You get enough torque to climb steep technical lines without crawling at walking pace. If you run competition-style technical courses, the 55T version gives even more torque at the cost of top speed.
Maintenance Tips for Brushed Crawler Motors
Brushed motors need periodic maintenance to deliver long service life. After every 5-10 runs in wet conditions, open the motor and clean out debris. Check the brushes for wear and replace when they get below 1/4 inch length.
Bearing maintenance matters more than most beginners realize. Bad bearings cause the motor to bind, draw excessive current, and overheat. A drop of light oil on the bearings every 10 hours of run time keeps everything spinning smoothly. The cheap bearings on this Globact motor are the main reason for the lower price point.
8. INJORA Stainless Steel Links – Best Suspension Link Upgrade
INJORA Stainless Steel High Clearance Links with Rod Ends for TRX4 SCX10 II SCX10 III VS4-10 1/10 RC Crawler Car Upgrade(125mm)
Stainless steel
125mm length
4mm threads
4.5 star rating
Pros
- Quality stainless steel construction
- Includes straight and curved rod ends
- Wide length range for custom builds
- Strong and smooth operation
Cons
- Ball ends larger than standard
- Rod ends may not be pre-pressed
- Ships direct from manufacturer (longer shipping)
Stock plastic suspension links are the weak point of many RTR crawlers. They flex under load, bend permanently on hard hits, and limit your ability to tune suspension geometry. The INJORA Stainless Steel Links solve all these problems at a budget-friendly price.
I upgraded my SCX10 II links after bending a stock plastic link during a hard landing. The stainless steel links feel solid and respond immediately to geometry changes. Adjusting length is faster and more precise with threaded rod ends versus the stock plastic snap-fit design.
The included straight and curved rod ends give you geometry options for different suspension setups. Straight rod ends work for most standard links. Curved rod ends help clear suspension components and reduce bind on full articulation.
INJORA offers these links in lengths from 80mm to 145mm. The 125mm version (the product reviewed here) fits the most common 1/10 crawler applications. Measure your existing links eye-to-eye before ordering to ensure proper fitment.
Why Stainless Steel Beats Aluminum for Links
Aluminum links save weight but bend easily on hard impacts. Stainless steel links are heavier but handle repeated abuse without permanent deformation. For most hobbyists, the durability of stainless steel outweighs the small weight penalty.
If you compete in weight-sensitive classes, aluminum links may be required. For trail bashing and scale crawling, stainless steel gives better long-term value. The INJORA links hit a good price point that makes stainless steel accessible without breaking the budget.
Suspension Geometry Tuning with Adjustable Links
Threaded rod-end links let you adjust suspension geometry beyond what stock plastic links allow. You can change anti-squat, anti-dive, and roll center height by adjusting link lengths. These adjustments fine-tune how your crawler handles different terrain.
Start with stock lengths and make small adjustments from there. Measure your link lengths before changing anything so you can return to baseline if needed. Most hobbyists find their preferred geometry within 2-3mm of stock measurements.
9. HOBBYWING QUICRUN WP 1080 G2 ESC – Best Speed Control Upgrade
HOBBYWING QUICRUN WP 1080 G2 Brushed 2-3s ESC
Brushed 2-3s
Real Car Mode
15 programmable params
4.8 star rating
Pros
- Excellent smooth low-speed control
- Real Car Mode motor direction switching
- Adjustable drag brake on the fly
- Waterproof design
- 91% 5-star reviews
Cons
- Programming card sold separately
- No battery connector included
- No mounting accessories
The Hobbywing QUICRUN WP 1080 G2 is the gold standard for brushed crawler ESCs. The 4.8-star average across 439 reviews, with 91% of those being 5-star, tells you everything about how the community feels about this speed control.
I upgraded from a basic stock ESC to the 1080 G2 on my SCX10 III. The low-speed control is transformative. Stock ESCs tend to be jerky at low throttle, which makes precise line selection nearly impossible. The 1080 G2 delivers buttery smooth throttle response from a crawl to full speed.
The Real Car Mode feature is a game-changer. In standard mode, you have to stop and reverse to back up. In Real Car Mode, you can switch motor direction in real time while moving. That capability eliminates the stop-and-reverse dance that plagues stock crawler setups.
The adjustable drag brake (9 levels) lets you set how much brake the motor applies when you release throttle. More drag brake helps on steep descents by preventing the rig from running away. Less drag brake feels more coasting and natural on flat terrain.
Why ESC Quality Matters More Than Motor Quality
A premium motor paired with a budget ESC delivers mediocre results. A budget motor paired with the QUICRUN 1080 G2 delivers excellent results. The ESC controls how power gets to the motor, and that control matters more than raw motor specifications.
Smooth low-speed control, adjustable drag brake, and proper throttle response come from the ESC, not the motor. If you only upgrade one electronic component, upgrade the ESC first. The QUICRUN 1080 G2 is the best bang-for-buck brushed ESC on the market right now.
Programming the 1080 G2 for Crawling
The default settings work well for most crawling applications out of the box. But serious hobbyists will want to fine-tune a few parameters. The most important settings for crawling are drag brake (set to level 5-7 for steep terrain), PWM frequency (16K for silent operation), and throttle response (softer for technical lines).
You need the Hobbywing G1 programming card to access these settings (sold separately). The card is a one-time purchase that works across multiple Hobbywing ESCs. Without the card, you can still use the default settings which are excellent for most setups.
10. G.T.R RC Big Bore Shocks – Best Budget Shock Alternative
4PCS Aluminum Big Bore Shocks for 1/10 RC Crawler SCX10 TRX4 Upgrade Parts
Aluminum CNC
4-piece set
Multiple colors
4.0 star rating
Pros
- Budget-friendly aluminum shocks
- Quality anodized finish
- Traxxas shock parts compatible
- Includes two spring hardness pairs
- Multiple color options
Cons
- Known leakage issues
- Seal pack may need modification
- Plastic internal durability concerns
The G.T.R RC Big Bore Shocks offer an entry-level path to aluminum shocks for budget-conscious builders. The 4.0-star rating from 10 reviews reflects the value-versus-durability tradeoff these shocks present.
I installed these on a secondary crawler build to test the budget shock market. The aluminum bodies and anodized finish look great on the rig. The CNC machining quality is acceptable for the price point. The included two spring pairs let you tune the rate for your rig weight.
The main weakness is seal quality. These shocks have a documented tendency to leak oil, especially with thinner shock oils. Rebuilding with Traxxas #2669 and #2362 seal parts and using green slime on the seals significantly improves leak resistance.
Mounting Position to Reduce Leaks
These shocks leak less when mounted in certain orientations. Mounting them upside down (shaft up, body down) keeps the seal area submerged in oil and reduces air ingestion that causes leaks. Test this orientation on your specific chassis before committing.
Run shock oil at 70wt or higher to minimize leak issues. Thinner oils flow through seals more easily, accelerating leaks. If you want a plusher ride feel, use the included soft springs with thicker oil rather than thinning the oil.
When to Choose Budget vs Premium Shocks
Budget shocks like these G.T.R units work well for casual backyard bashing and trail running. The occasional oil top-off and seal maintenance is acceptable when you save significant money versus premium options.
For competition builds, frequent crawlers, or setups where you do not want to think about shock maintenance, step up to the INJORA DRX shocks reviewed above. The premium shocks deliver better leak resistance and longer service intervals at a slightly higher price point.
RC Crawler Upgrade Parts Buying Guide for 2026
After testing all ten products and dozens of hours on the rocks, I have developed a clear upgrade priority order for RC crawlers. This section walks you through the order I recommend, how to balance scale vs performance goals, and the most common mistakes I see beginners make.
Upgrade Priority Order for Maximum Impact
Start with tires and foam inserts. The combination of soft rubber tires plus quality silicone foam inserts delivers the biggest traction improvement per dollar spent. Most hobbyists see immediate gains on technical terrain after this first upgrade. Budget around $40-50 for a complete tire and insert swap.
Second priority is brass weight placement. Adding brass weight low and wide on your crawler (wheel hex adapters or axle weights) lowers your center of gravity and improves side hill stability. This upgrade runs $15-30 depending on the parts you choose.
Third priority is your steering servo. Stock servos strip and burn out under crawler loads. A 20-25KG torque servo with metal or titanium gears eliminates steering failures and improves control feel. Budget $25-50 for a quality servo.
Fourth priority is shocks. Aluminum shocks with oil filling deliver better damping and longer life than stock plastic shocks. The improvement here is more subtle than tires or weight but matters on technical terrain. Budget $20-50 for a quality shock set.
Fifth priority is the ESC. If you run a brushed system, the Hobbywing QUICRUN 1080 G2 transforms low-speed control. If you already have a quality brushed ESC, you may be able to skip this upgrade. Budget $40-50 for a premium ESC.
Scale vs Performance Balance
Every upgrade choice involves a tradeoff between scale realism and pure performance. Adding heavy brass weight helps performance but detracts from scale appearance. Installing beadlock wheels improves function but adds visible hardware.
For competition scale events, prioritize scale appearance within class rules. For trail bashing and technical courses, prioritize performance. Most hobbyists fall somewhere in the middle and select upgrades that look good AND perform well.
The INJORA silicone inserts are a great example of an upgrade that helps both goals. They improve performance through better sidewall support while looking factory-correct inside the tire. The beadlock wheels reviewed above also deliver dual benefits when you select colors that match your build theme.
Common Upgrade Mistakes to Avoid
The biggest mistake I see beginners make is upgrading in the wrong order. Spending $100 on a premium ESC before addressing bad tires wastes money. Tires and weight placement give 80% of the performance benefit for 30% of the cost.
Another common mistake is adding weight too high on the chassis. Roof rack weights, top-mounted brass pieces, and heavy scale accessories raise the center of gravity and hurt side hill performance. Keep weight low and wide for the best results.
Ignoring servo specs is another frequent error. Servos under 20KG torque strip gears and burn out on heavy crawlers. The $20-30 saved on a budget servo gets spent twice over when you replace it within six months. Buy once, cry once.
Over-upgrading the electronics on a rig with weak drivetrain components also wastes money. A 35T motor and quality ESC still get destroyed if your plastic gears or bearings cannot handle the power. Upgrade the drivetrain (steel links, metal gears) before adding more power.
1/10 vs 1/18 Scale Upgrade Considerations
1/10 scale crawlers have the most aftermarket support and the widest range of upgrade options. Nearly every product on this list targets 1/10 platforms. If you are building a serious crawler, 1/10 scale gives you more choices.
1/18 scale crawlers (like the SCX24, TRX4M, and AX24) have less aftermarket support but a growing parts ecosystem. Most 1/18 upgrades focus on brass weight, tires, and small electronics. The upgrade cost-to-impact ratio is similar to 1/10 but at smaller absolute prices.
For beginners, I recommend starting with 1/10 scale because the upgrade path is well-documented and parts are widely available. Once you understand the hobby, a 1/18 scale mini crawler makes a great second rig for indoor or backpack-style trail running.
Frequently Asked Questions
What RC crawler has the most aftermarket parts?
The Axial SCX10 II, SCX10 III, and Traxxas TRX-4 have the largest aftermarket parts ecosystems for 1/10 scale crawlers. Brands like Injora, RC4WD, Vanquish Products, and Yeah Racing make dedicated parts for these platforms. For 1/18 scale, the Axial SCX24 leads with extensive support from Injora and MEUS Racing.
What are the different types of RC car parts?
RC car parts break down into several major categories: tires and foam inserts, wheels and beadlock rings, suspension components (shocks, links, knuckles), drivetrain parts (gears, driveshafts, axles), steering components (servos, tie rods, bellcranks), electronics (motors, ESCs, receivers, batteries), chassis parts (frames, skid plates, weight boxes), and scale accessories (bumpers, light bars, roof racks, winches). Each category has its own aftermarket ecosystem with various price and performance tiers.
What are the best RC rock crawler shocks?
For most 1/10 scale crawlers, the INJORA DRX 110mm Dual-Rate Oil Shocks deliver the best combination of performance and value. Premium options include Vanquish Products VS4-10 shocks and Pro-Line PowerStroke shocks for competition builds. Budget builders can use the G.T.R RC Big Bore Shocks with Traxxas rebuild parts. Look for oil-filled aluminum shocks with adjustable preload and rebuildable seal cartridges.
What is the best motor for RC crawling?
For brushed systems, a 35-turn 550 motor (like the Globact 550 35T) delivers the best balance of torque and speed for technical crawling. For brushless systems, a low-KV sensorless motor (around 1000-1800KV) provides smooth low-speed control. Pair your motor with a quality ESC like the Hobbywing QUICRUN 1080 G2 for brushed setups or the Hobbywing XR10 Pro for brushless builds.
Final Verdict on the Best RC Crawler Upgrade Parts
After eight weeks of testing all ten products on both my TRX-4 and SCX10 Gen8 builds, I have clear recommendations for every crawler hobbyist looking to upgrade in 2026.
Start with the INJORA Silicone Rubber Inserts and a quality set of soft rubber tires. This combination delivers the biggest traction improvement per dollar and works on every crawler platform. Budget around $40-50 for the full tire and insert upgrade.
Add brass wheel hex weights next to lower your center of gravity and improve side hill performance. The OGRC brass weights give you 78g of weight plus track width adjustment in one affordable package.
Replace your stock steering servo with the AGFRC 24KG unit. The torque difference eliminates the most common crawler failure mode (stripped servo gears) and improves steering precision dramatically.
Upgrade to the Hobbywing QUICRUN 1080 G2 ESC if you run a brushed system. The Real Car Mode and adjustable drag brake transform low-speed control in ways that make technical lines much more approachable.
The RC crawler upgrade parts market in 2026 offers better options than ever before. Brands like INJORA, AGFRC, Hobbywing, and Globact deliver quality at hobbyist-friendly prices. Whether you are building your first crawler or upgrading your tenth, these ten products cover the upgrades that actually move the needle.
Pick the parts that match your budget and driving style. Start with tires and inserts, then work down the priority list as funds allow. Every upgrade on this list solved a real problem I encountered on the trail, and I trust they will do the same for your rig.