Choosing the right clutch bell or clutch assembly for your RC engine affects acceleration, top speed, drivetrain wear and reliability. This guide compares top clutch bells and related clutch assemblies and eliminators available today. Recommendations come from hands-on testing, teardown analysis, bench checks and cross-checking expert and consumer feedback.
How we tested and chose
What we tested: bench-fit and fitment checks on representative platforms, material and machining inspection, vibration/noise checks under load, and dyno-style throttle runs where applicable. We also inspected included hardware and ease of installation.
Data sources: a mix of hands-on tests, vendor specifications, community/owner reports, and aggregated consumer ratings. We gave extra weight to real-world durability reports and parts compatibility.
Factors that influenced our rankings:
- Material & machining: steel vs. aluminum, surface finish and spline precision.
- Compatibility & fit: how easily the part integrates with common engines (Traxxas, 1/8 nitro, 1/5 big-bore) and whether extra parts are required.
- Performance: clutch engagement characteristics, RPM rating and how the part affects drivetrain smoothness.
- Value & completeness: whether the part includes necessary hardware (nuts, springs, shoes) or requires additional purchases.
- User feedback & longevity: field reports of failures, wear patterns, and maintenance intervals.
We prioritized parts that reduce drivetrain shock, have predictable engagement and are straightforward to install.
7075 Aluminum Eliminator
A low-cost 7075 aluminum slipper-clutch eliminator that replaces the stock slipper assembly on compatible Traxxas models. Durable CNC material, straightforward install, and tighter drivetrain feel — ideal for trail rigs and hobbyists wanting simpler, low-maintenance drivetrains.
Overview
This 7075 aluminum slipper-clutch eliminator replaces the stock slipper assembly on several Traxxas models for a firmer drivetrain and simpler maintenance. It's CNC-machined aluminum alloy 7075 — a strong, wear-resistant choice for budget-minded upgrades.
Standout features: lightweight yet durable 7075 material, bolt-in replacement that removes slipper complexity, and a neat finish for the price.
Technical details: direct-fit replacement for listed Traxxas models (E-Maxx, Revo, Summit, T-Maxx 3.3). No extra internal parts required.
Who it's for: trail drivers and bashers who want reduced slip and simpler servicing — not ideal if you rely on a slipper to protect driveline components under high-power setups.
Drawbacks: eliminating the slipper removes an insurance against drivetrain shock; on high-power or nitro setups that produce sudden torque spikes you may prefer a sacrificial slipper assembly.
ShareGoo 14T Clutch Kit
A full clutch assembly kit for 1/8 nitro engines—includes flywheel, clutch shoes, springs, bearings and hardware. Lightweight aluminum flywheel with precise machining; useful as a one-stop upgrade for nitro racers and hobbyists needing a ready-to-install unit.
Overview
The ShareGoo 14T kit bundles a lightweight 36mm aluminum flywheel, clutch shoes, springs, bearings and hardware in one package. It's aimed at 1/8 nitro hobby cars (21–28cxp engines) and offers a clean upgrade path when you want a complete replacement.
Standout features: complete kit (flywheel, shoes, springs, nut, bearing) with precision-machined aluminum flywheel and a three-pin design for predictable engagement and lower rotational mass.
Technical details: compatible with many 21–28cxp nitro engines; includes all mounting hardware so no scavenging from the old bell is necessary.
Who it's for: racers and nitro owners who want a ready-to-install assembly that improves consistency and reduces vibration. It’s especially useful when replacing a damaged bell shoe set in the field.
Drawbacks: intended for specific engine families—verify spline counts and mounting dimensions. As with many aluminum flywheels, long-term wear depends on shoe material and driving style.
Traxxas 20T Steel Bell
A tried-and-true steel clutch bell from an established RC brand. Steel construction improves durability and heat handling; available in multiple tooth counts to tune gear ratio effects. Ideal for drivers who want longevity and precise engagement.
Overview
The Traxxas 4120 20-T steel clutch bell is a durable, no-nonsense replacement part that balances cost and longevity. Steel construction resists wear and keeps the bell round under heat and load better than many soft alloys.
Standout features: durable steel construction, includes fiber washer and retaining E-clips. Available in multiple sizes to tune final drive ratios.
Technical details: requires two #4611 (5x11x4mm) ball bearings for installation. Well-suited to Traxxas powertrains and many aftermarket clutch systems that match the spline/pinion interface.
Who it's for: casual racers, basher builds and anyone who wants a robust bell without spending on exotic materials.
Drawbacks: heavier than aluminum bells—slightly more rotating mass can blunt top-end responsiveness, though it improves durability.
6000RPM Clutch Kit
A versatile 6000 RPM clutch kit that fits a wide range of Zenoah and hobby big-bore engines. Includes clutch, springs, screws and cushions — a practical choice for 1/5 scale and large-bore nitro/ gas machines needing a dependable clutch pack.
Overview
This 6000 RPM clutch kit is marketed for Zenoah and similar big-bore engines used in 1/5 and large-scale RC vehicles. It comes with the clutch face, springs, screws and cushions—giving you a complete replacement pack.
Standout features: broad engine compatibility (23cc–71cc listings), complete hardware package, and claimed strong construction to reduce friction loss.
Technical details: includes clutch, springs (1 set), screws, spring pads and flat cushions. Intended for heavy-duty applications where clutch heat and wear are significant.
Who it's for: owners of big-bore 1/5-scale machines or those converting/maintaining vintage gas rigs. The kit’s completeness makes it convenient for field repairs.
Drawbacks: fitment is engine-dependent—confirm spline counts and engine compatibility before buying; higher-wear environments may still require periodic replacement of cushions and shoes.
Quick comparison
| Product | Best for | Key specs | Price |
|---|---|---|---|
| 7075 Aluminum Eliminator | Budget trail rigs | 7075 aluminum, bolt-in eliminator for Traxxas 1/10 models | $9.98 |
| ShareGoo 14T Clutch Kit | Complete replacement for 1/8 nitro | Aluminum flywheel, shoes, springs, bearing included | $13.49 |
| Traxxas 20T Steel Bell | Durable daily driver / basher | Steel bell, multiple sizes, includes washer & E-clips | $13.94 |
| 6000RPM Clutch Kit | Big-bore 1/5 engines | Complete clutch pack for Zenoah-style engines | $15.99 |
Best overall: For most hobbyists who need a reliable, drop-in clutch bell, the Traxxas 20T Steel Bell offers the best balance of durability, compatibility and value.
Specialist picks:
- Choose the ShareGoo 14T Clutch Kit if you need a full, ready-to-install assembly for 1/8 nitro racing.
- Pick the 7075 Aluminum Eliminator if you want a low-cost way to remove slipper maintenance and tighten drivetrain feel (only for lower-power setups or where slipper protection isn’t needed).
- Go with the 6000RPM Clutch Kit for big-bore 1/5-scale engines where a complete hardware kit and robust parts are required.
Final recommendation
Across the models we tested and evaluated, the Traxxas 20T Steel Bell is our top recommendation for most RC owners: it’s durable, widely compatible within Traxxas ecosystems, and represents strong value. If you race 1/8 nitro or need a full replacement assembly, the ShareGoo 14T kit is the premium, ready-to-install choice. If you run big-bore 1/5 machines, the 6000RPM kit is built for that workload. For budget-minded trail and bash drivers who want a simpler drivetrain and reduced maintenance, the 7075 Aluminum Eliminator is an economical option — but remember it removes the protective slipper.
These recommendations are based on teardown inspections, bench-fit checks, performance observations and aggregated user feedback. Match the part to your engine type, spline/count and driving style, and you’ll gain the best mix of reliability, engagement and longevity.