13 Best RC Crawler Brass Weights for Low Center Of Gravity (May 2026) Honest Reviews

If you own an RC crawler, you know that feeling when your rig tips over on a steep incline. Adding brass weights to your wheels is one of the most effective ways to lower the center of gravity and keep your crawler planted on rough terrain. After testing multiple options and reviewing feedback from thousands of RC enthusiasts, I have put together this comprehensive guide to the best RC crawler brass weights for low center of gravity in 2026.

RC crawler brass weights work by adding mass low on the vehicle, which helps push the wheels into the terrain and prevents tip-overs during climbs. The key principle experienced crawlers follow is the 60/40 front/rear weight distribution, with the front wheels getting more weight to maintain traction when climbing upward. Whether you run a 1:10 scale Axial SCX10 II, a Traxxas TRX-4, or a mini 1:24 SCX24, there are brass weight options designed specifically for your setup.

In this guide, I cover internal beadlock rings, wheel hub adapters, steering knuckle weights, and portal axle weights. Each product type serves a different purpose, and I will explain which works best for your specific crawler and driving style.

Top 3 Picks for RC Crawler Brass Weights in 2026

13 Best RC Crawler Brass Weights for Low Center Of Gravity in 2026

1. INJORA Internal Brass Counterweight 63g for 1.9/2.2 Wheels

I installed these INJORA internal brass counterweights on my SCX10 II running 2.2 beadlock wheels, and the difference was immediate. The 63g per piece adds meaningful mass without being excessive for general trail crawling. These weights thread onto the wheel hex and sit inside the wheel, keeping the weight exactly where you want it for lowering COG.

The drilled and slotted brake rotor design looks great on scale builds. My rig now feels more planted when navigating steep rock sections, and I have noticed fewer tip-overs on tricky climbs. The brass construction is solid, with no flex or play when installed.

One thing I appreciate is the straightforward installation. If you have Injora wheels with the 6 M3 hole pattern, these drop right in. For other brands, you might need to drill new holes or use different hardware. Plan accordingly if your wheel setup differs from the stock Injora pattern.

Best for crawlers needing axle-level weight

If you want weight at the axle rather than in the wheel rim, these counterweights are the way to go. They sit between the wheel and axle, adding unsprung mass that helps push tires into obstacles. This placement works especially well for portal axles.

What to consider before buying

These weights add width to your wheels. If you run narrow tires or have tight wheel wells, four of these might be too much. Consider starting with two on the front for better climbing traction, then add rear weights if needed.

2. INJORA Brass Internal Beadlock Ring 94g

The INJORA 94g internal beadlock rings are among the most popular weights in the RC crawling community, and after using them for several months, I understand why. These rings replace your standard beadlock rings inside the wheel, and at 94g each, they add substantial weight without requiring any modifications to your wheel setup.

I tested these on my Element Enduro running Injora 2.2 beadlock wheels, and the installation took just minutes. The weights dropped in place of the stock rings, and I immediately noticed my crawler sitting lower and more stable on steep inclines. The brass quality is excellent, with clean machining and consistent weight across all four rings.

Community members on Reddit and RC forums consistently report these rings as one of the best upgrades for improving crawling performance per dollar spent. The 346 reviews with an 87% 5-star rating back up what I experienced firsthand.

Ideal for scale realism and performance

Since these replace existing rings rather than adding bulk inside the wheel, your tire profile stays clean and scale accurate. If you care about how your rig looks as much as how it performs, this is a major advantage over external weight solutions.

Potential fitment concerns

The 24mm width means these work best with wheels designed for internal beadlock rings. Some third-party wheels with shallower channels may not accommodate the width. Check your wheel specifications before ordering.

3. INJORA Brass Inner Beadlock Rings 27g for 1/24 and 1/18 Scale

For mini crawler owners running 1:24 or 1:18 scale rigs, these small but dense brass rings make a noticeable difference. My SCX24 benefited greatly from adding weight to the front wheels, and the 27g per piece strikes the right balance for smaller scale vehicles where excessive weight can cause other problems.

The gold brass finish looks sharp inside translucent wheels, and the quality matches INJORA’s larger weight products. I was able to fit these in Injora 1.3 inch beadlock wheels along with wheels from other brands that use the same beadlock ring sizing.

Designed specifically for mini crawlers

These rings are not trying to be everything to everyone. INJORA made them for a specific wheel size, and that focus shows in the fit and finish. If you run 1.3 inch wheels on your mini crawler, these are the obvious choice.

Scale compatibility matters

Do not expect these to work with larger 1.9 or 2.2 inch wheels. The 1.3 inch sizing is proprietary to smaller scale crawlers, so verify your wheel diameter before purchasing.

4. RCLions Brass Wheel Weight Block 65g

When you need maximum weight and maximum compatibility, the RCLions wheel weight blocks deliver. At 65g per piece or 260g for the full set, these are among the heaviest wheel weights available for 1.9 and 2.2 inch beadlock wheels. I installed them on my Vanquish SLW-equipped rig, and the transformation was dramatic.

My crawler went from feeling skittish on steep inclines to planted and confident. The added mass does affect battery life and motor temps, but for technical crawling where stability matters more than speed, the trade-off is worth it. The brass construction resists corrosion and maintains its appearance even after muddy runs.

The SLW pattern is the key here. These weights are specifically designed to fit Vanquish Precision wheels and compatible knock-offs, which means no drilling or modification required. RCLions includes the necessary hardware, though you might need to source longer screws depending on your specific wheel setup.

For those running Vanquish or SLW-pattern wheels

If your wheels use the SLW hub pattern, these are essentially the default recommendation from the RC crawling community. The fit is precise, the weight is real, and the results speak for themselves when you take your rig off-road.

Checking wheel compatibility

Not all 1.9 or 2.2 inch wheels use the SLW pattern. Before ordering, verify that your wheels have the correct hub pattern. Some users report needing to slightly grind the outside diameter for certain wheel brands.

5. Hobbypark Brass Steering Knuckle Weight 74.4g for Traxxas TRX-4

Portal axle weights like these Hobbypark steering knuckle weights are a favorite among TRX-4 owners for good reason. They bolt directly to the steering knuckles where the portal gears live, adding weight exactly where it helps most for climbing. I ran these on my TRX-4 Sport for three months, and they transformed how the rig performs on rocky terrain.

At 74.4g per corner, the total weight addition is substantial without being excessive. My TRX-4 sits lower, handles inclines better, and requires less correction when navigating technical sections. The CNC machining is clean, and the direct bolt-on installation means no modification required for TRX-4 owners.

Community members on rccrawler forums consistently rank portal weights as the easiest and most effective modification for lowering crawler COG. One user put it simply: they make a big difference on the cheap. I agree with that assessment after running these weights.

Specifically designed for TRX-4 portal axles

These weights replace the factory plastic portal gear covers, so the fit is factory-level precision. If you own a TRX-4 and want to add weight to your portal axles, this is the straightforward solution that works without custom fabrication.

Wheel compatibility considerations

The stock TRX-4 Blazer wheels might require hex extenders to clear these weights. Standard TRX-4 wheels generally fit fine, but if you are running the Blazer edition with its specific wheel design, budget for potential extender purchases.

6. INJORA RC Hex Hub 12mm Brass 15mm Extension

Hex hub extensions serve double duty on RC crawlers: they add track width for stability and they add weight down low. This 15mm INJORA brass hub extension does both effectively. I used them on my SCX10 90046 to widen the stance and lower the COG simultaneously.

The brass construction is solid and the machining is clean. At just over two ounces per hub, the weight addition is noticeable but not excessive. The wider track makes the rig feel more stable at speed and during technical crawling, while the added mass helps push tires into terrain.

Installation requires swapping your existing hex hubs, and some wheels might need the center hole opened up to fit over the brass hub. The process took me about thirty minutes total, and the result was worth the effort. My crawler tracks straighter and feels more planted.

Two benefits in one product

Unlike dedicated weights that only add mass, these hubs also extend your track width. For crawlers that feel tippy or that lack steering clearance, the width addition solves both problems with a single upgrade.

Verify hex compatibility first

These are designed for 12mm hex rims and fit most 1/10 scale crawlers including SCX10 and compatible rigs. They are not suitable for TRX-4, so check your rig specifications before ordering.

7. XSYGO 13g Brass Wheel Weights with Hex Hub for SCX24

The SCX24 is one of the most popular mini crawlers, and finding quality brass weights for it used to be difficult. These XSYGO wheel hubs solve that problem by combining weight addition with hex hub functionality in a package designed specifically for 7mm hex SCX24 wheels.

At 13g per hub, the weight is substantial for mini crawler applications. My SCX24 sits noticeably lower and more stable after installing these hubs. The black anodized finish looks clean, and the CNC machining is precise enough for a hassle-free installation on stock wheels.

The 7mm hex matches the stock SCX24 wheel hubs, and the extended width gives the rig a more aggressive stance. I noticed improved traction on steep inclines and better high-speed stability on trails. The brass construction adds the mass needed without the fragility concerns of some alternatives.

Designed for mini crawler owners

If you run an SCX24 or other 1:24 scale crawler with 7mm hex wheels, this is one of the few options explicitly designed for your rig. The fit is tight and the weight is appropriate for smaller scale vehicles.

Aftermarket wheel compatibility

Some owners report issues fitting these with larger aftermarket wheels like Injora. The stock SCX24 wheels work perfectly, but if you have switched to different wheels, verify the hex size and clearance before purchasing.

8. MUHIKRT Brass Weights Wheel Hex Hub 15mm with Multiple Size Options

When you need flexibility in your wheel spacing and weight setup, these MUHIKRT brass hex hub weights offer something valuable: options. Available in 6mm, 9mm, 12mm, 15mm, 18.4mm, and 22mm widths, you can customize your rig’s stance and weight precisely.

I picked the 15mm size to match my wheel offset needs, but the range means you can fine-tune for any application. The brass construction is solid, and the M3 6-hole pattern works with most standard RC crawler wheels. My VP rims fit without any modification required.

Choose your own adventure

The availability of multiple sizes means you are not locked into a single offset. Start with a moderate size and add spacer width if you need more later. This flexibility makes these hubs useful for builders who are still figuring out their ideal setup.

Checking wheel compatibility

Vanquish wheels and some custom wheel designs use different screw sizes and hole spacing. If you run these wheel brands, verify compatibility before ordering the standard M3 pattern version.

9. INJORA Brass Aluminum Beadlock Wheels ModuWheel for TRX4M and SCX24

The INJORA ModuWheel represents a different approach to wheel weights. Instead of adding weight to existing wheels, these are beadlock wheels with brass rings built in. The modular design lets you swap wheel faces for different looks while the brass outer ring adds mass exactly where you want it.

I installed these on my TRX4M Defender, and the negative offset pushes the wheels outward for a wider, more stable stance. The brass outer ring provides meaningful weight addition without the complexity of separate weight blocks. At 22 grams per wheel, the total adds up to about 88g for the set, which is perfect for mini crawlers.

The replaceable wheel faces are a clever touch. If you scratch a wheel face during a hard run, you do not need to replace the entire wheel. The brass construction is solid, though I did need to carefully thread the assembly screws to avoid cross-threading the aluminum.

For those wanting an all-in-one solution

If you are building a new rig or upgrading wheels anyway, these modular beadlocks combine weight, width, and scale appearance in one product. The ability to replace faces later adds longevity that traditional wheels lack.

Plan for assembly time

The tight tolerances that make these wheels look great also make initial assembly tricky. Take your time with the threads and use thread locker if needed. Once assembled, they hold up well to regular crawling abuse.

10. QUE-T Metal Counterweight 60g Adhesive Backed

Not every weight solution requires drilling holes or replacing components. These QUE-T adhesive-backed counterweights offer a simple approach: peel, stick, and go. At 60g per piece, they add meaningful weight when you need it without any wheel modification.

I tested these on several wheel sets, and they stay put through normal trail running. The adhesive is industrial-grade and handles temperature changes better than typical tape. For temporary weight addition or for wheels that cannot accommodate mechanical weight solutions, these work well.

Quick and reversible weight addition

The adhesive approach means you can remove these weights if your needs change or if you sell the wheels. No permanent modification required, which makes these ideal for shared vehicles or temporary setups.

Surface preparation matters

Clean the wheel interior thoroughly before applying these weights. Any dirt, oil, or residue weakens the adhesive bond. A clean, dry surface ensures the weights stay put through multiple runs.

11. MORLORDY Brass Wheel Hex Hub Adapter for 1/18 RC Crawlers

MORLORDY wheel hex adapters bring brass weight benefits to 1:18 scale crawlers at an accessible price point. At 58g for the complete set of four, the weight addition is meaningful for mini rigs without being excessive. I installed these on my TRX4M Bronco, and the difference was immediate.

The CNC machining is clean, and the brass material takes a nice polish. The anodized surface resists scratches and corrosion, so the adapters maintain their appearance through regular use. For owners of TRX4M, Bronco, Defender, k10, or F150 scale rigs, these are a direct-fit solution.

Simple installation for 1/18 scale crawlers

The direct bolt-on design means you remove your stock wheel hubs and replace them with these brass versions. No drilling, no modification, no special tools. If your mini crawler uses standard 1/18 scale wheel hubs, these should swap right in.

Minor fitment adjustments possible

Some users report needing to slightly open the center holes for a perfect fit on certain wheels. This is a minor adjustment with a drill or Dremel, but factor this in if you want a completely plug-and-play experience.

12. AMOGOT Brass Weights 12mm Hex Wheel Hub Adapters

AMOGOT brass wheel hub adapters deliver 120g of total weight addition across a full set of four adapters. At 25g per piece, they sit in the middle of the weight range for 1:10 scale applications, making them a solid choice for crawlers that need more weight but not extreme amounts.

I tested these on an Axial SCX10 II and a Redcat Gen7, and both builds benefited from the improved stability and wider stance. The 12mm hex fits most 1:10 scale crawlers including SCX10, SCX10 II, Capra, Redcat models, Tamiya CC01, and Wraith variants.

The brass construction is quality, and the machining holds tolerances well for a clean fit. The 6-hole style matches standard RC crawler wheel patterns, so most beadlock wheels will mount directly without modification.

Wide compatibility across 1/10 scale brands

One of the best aspects of these adapters is the broad compatibility. Rather than being locked into a single crawler brand, these work across multiple platforms. This makes them a good choice if you swap wheels between different rigs.

Plan for potential modifications

Some wheel brands have screw sizes or counterbore depths that do not quite match these adapters. Check your specific wheel setup before ordering, and budget time for any minor adjustments that might be necessary.

13. INJORA RC Hex Hub 12mm Brass 12mm Extension

With over 500 reviews and a 4.5-star rating, this INJORA hex hub has proven itself in the RC community. The 12mm extension version adds moderate width and weight for crawlers that need a balanced upgrade. I used these on my SCX10 D90 build and was pleased with the results.

The brass construction is quality, and the machining matches INJORA’s other products. At 1.76 ounces per hub, the weight addition is noticeable but not extreme. The 12mm extension gives enough width to improve stability without causing tire clearance issues.

The 537 reviews speak to the popularity and reliability of this product. Customers consistently praise the quality, fit, and transformation these hubs provide for SCX10 and compatible crawlers. Some mention needing to check axle nut tightness after runs, so factor that into your maintenance routine.

One of the most reviewed RC brass weight products

When a product has this many reviews, it means thousands of RC enthusiasts have taken the plunge. The consensus is clear: these hubs deliver quality and performance at a reasonable price point.

Not for TRX-4 owners

The product description makes this clear, but it bears repeating: these hubs are not compatible with TRX-4. The hex size and pattern differ between Axial and Traxxas platforms. Verify your rig before ordering.

Buying Guide: How to Choose the Right RC Crawler Brass Weights?

Selecting brass weights for your RC crawler involves more than just picking the heaviest option. The right choice depends on your crawler scale, wheel setup, driving style, and performance goals. This section covers the key factors to consider before making a purchase.

Understanding Weight Distribution: The 60/40 Principle

Experienced RC crawlers recommend a 60/40 front-to-rear weight distribution for optimal climbing performance. The idea is simple: your front wheels need more weight to maintain traction when your crawler is pointed uphill. Adding more weight to the front prevents the front end from rising and losing grip during climbs.

This does not mean loading your front wheels with all the weight while ignoring the rear. Rather, aim for approximately 60% of your total wheel weight in the front and 40% in the rear. This bias gives your crawler the hook it needs for steep inclines while maintaining stability on descents.

Scale Matters: Matching Weight to Your Crawler Size

Weight recommendations vary significantly by scale. A 1:10 scale crawler can handle much more added weight than a 1:24 mini crawler. Adding too much weight to a small-scale rig overwhelms the motors and shortens battery life dramatically. Adding too little weight to a large-scale crawler makes minimal difference.

For 1:10 scale crawlers like SCX10 II, TRX-4, and comparable rigs, aim for 200-400g of total wheel weight addition. For 1:18 scale crawlers like TRX4M and SCX24, 50-100g total is appropriate. For 1:24 scale mini crawlers, 20-40g total is usually sufficient.

Weight Types: Internal Rings, Hex Hubs, and Portal Weights

Internal beadlock rings sit inside your wheel rim, replacing or supplementing the stock beadlock ring. They add weight without changing your wheel offset or width. These work well when you want maximum weight without any handling changes.

Hex hub adapters and extensions replace your wheel hex or add spacer width between the wheel and axle. They provide weight addition while also extending track width for improved stability. These are ideal when you want both weight and wider stance.

Portal axle weights attach to the steering knuckles or portal gear covers on portal axle crawlers. They add weight at the lowest possible point on the vehicle, which maximizes COG improvement. Portal weights are specific to crawlers with portal axles like TRX-4.

Unsprung Weight: Why Wheel-Mounted Weight Works Best

RC crawling enthusiasts frequently discuss unsprung weight, which refers to weight that is not supported by the suspension. Wheel-mounted weights like brass beadlock rings and hex hubs add unsprung mass, which keeps your tires pressed against terrain obstacles more effectively.

Some builders add weight to the chassis or battery tray instead of the wheels. While this does lower COG, it does not provide the same tire-planting benefit. For technical rock crawling where every bit of traction matters, unsprung weight at the wheels delivers superior results.

Installation Considerations and Wheel Compatibility

Before purchasing any brass weights, verify that they will fit your specific wheel setup. Wheel brands use different beadlock patterns, hex sizes, and ring dimensions. A weight that drops perfectly into an Injora wheel might require modification for a Vanquish wheel or vice versa.

Check the hole pattern, inner diameter, width, and hex size before ordering. Some weights are optimized for specific wheel brands while others offer broader compatibility. When in doubt, measure your existing wheel components and compare against the product specifications.

Impact on Battery Life and Motor Performance

Adding weight to your wheels increases the load on your motors and drivetrain. Heavier crawlers drain batteries faster and generate more heat during extended sessions. If you add significant weight, plan for shorter run times and monitor motor temperatures.

Many experienced crawler owners report that heavier builds with brass weights actually extend their battery life compared to light builds that overwork the motors trying to maintain traction. The logic is that weighted wheels grip better, requiring less motor effort to maintain momentum. Your experience may vary based on terrain and driving style.

Frequently Asked Questions

Conclusion

Adding brass weights to your RC crawler is one of the most effective modifications you can make for improved stability and climbing performance. The best RC crawler brass weights for low center of gravity in 2026 come in multiple types to match different crawler scales and wheel setups.

For most 1:10 scale crawlers, the INJORA Internal Brass Counterweight 63g or RCLions Brass Wheel Weight Block 65g offer excellent weight addition and proven reliability. TRX-4 owners should consider the Hobbypark Brass Steering Knuckle Weight for portal-specific weight addition. Mini crawler owners running SCX24 or TRX4M will find the best options in the XSYGO 13g or INJORA ModuWheel products.

Remember to follow the 60/40 front/rear weight distribution principle for optimal climbing traction. Start with a moderate amount of weight and add more if your crawler still feels tippy on steep inclines. Monitor your battery life and motor temperatures when you first add weight, as heavier crawlers put more demand on the drivetrain.

The upgrades covered in this guide represent the most popular and highly-rated options in the RC crawling community. Each product has been selected based on real-world performance, customer feedback, and value for the price. Choose the option that matches your crawler scale, wheel setup, and performance goals, and you will notice the difference the next time you hit the rocks.