50mm High-Performance Ceramic rear axle bearing for TONY KART Racer 401rr
Raceet® ceramic rear axle bearings for 50 mm karting axles for Tony Kart Racer 401rr are specifically engineered for competition kart chassis equipped with a 50 mm rear axle, commonly used in categories such as KZ, KZ2, OK, OK Junior and high-performance senior classes. Featuring hybrid technology (high-strength steel races combined with high-density ceramic balls), these bearings deliver maximum friction reduction, ultra-smooth rotation and enhanced mechanical efficiency. The ceramic balls, lighter and harder than standard steel, significantly reduce energy loss in the drivetrain and improve power transmission. The result: stronger acceleration, faster response and greater stability at high speed. Designed for both competitive racing and intensive practice, these high-performance bearings are an ideal upgrade for drivers seeking performance, reliability and precision.
| Product | Ceramic rear axle bearing |
|---|---|
| Compatible with | |
| Brand | TONY KART 
|
| Model | RACER 401RR |
| Year | Select during purchase |
| Installation | Workshop / DIY |
Ceramic rear axle bearing Raceet® TONY KART RACER 401RR
Raceet® ceramic rear axle bearings allow the TONY KART Racer 401rr to reduce friction losses by 60% and increase bearing lifespan by +40%
| Optimization | Friction | |
|---|---|---|
| Installation | Workshop / DIY | |
| Category | Karting | |
| Compatible | Tony-kart | |
| Model | Racer 401rr |
The images shown are for illustration purposes only. Price is per bearing. Please make sure to select the correct quantity for your axle. You may also send us your bearing dimensions by email if needed.
| Sujet | 50mm Ceramic rear axle bearing for KARTING TONY KART RACER 401RR |
|---|---|
| Question |
Boost your karting performance by reducing mechanical losses
Unlock the full performance of your kart with Raceet® high-performance ceramic rear axle bearings for Tony Kart Racer 401rr. Every detail matters in karting — and your rear axle bearings play a critical role in how efficiently power is transferred to the track. Standard bearings generate friction, waste energy and limit your kart's true potential. Raceet® ceramic technology changes everything. By drastically reducing rolling resistance, these bearings deliver faster acceleration, sharper throttle response and a noticeable gain in top-end efficiency. The result: a kart that feels more free, more responsive and more competitive from the very first lap. Built with hybrid technology (ultra-hard ceramic balls combined with high-strength steel races), they are engineered to handle extreme RPM, heavy loads and the harsh conditions of racing — from aggressive braking to repeated corner exits. They also offer superior durability, reduced heat buildup and long-lasting performance. Whether you race in Rotax, X30, OK or KZ, or push your limits in intensive practice, Raceet® ceramic axle bearings give you a real competitive edge: more speed, more consistency, more control — lap after lap, in all conditions.
Ceramic rear axle bearing technical specifications for Tony Kart Racer 401rr
At the heart of Raceet® performance lies advanced silicon nitride (Si3N4) ceramic ball technology — a material engineered for extreme conditions. Lighter, harder and more resistant than steel, these ceramic balls drastically reduce rotational inertia, delivering instant acceleration, sharper drivetrain response and a noticeably more "free-rolling" kart feeling from the first meters.
Unlike standard components, their ultra-dense structure minimizes deformation under load, maintaining maximum efficiency and precision even at very high RPM. The result is a perfectly consistent rotation, giving you better control, smoother corner exits and more stable performance lap after lap.
The high-strength precision-ground steel races are designed for seamless integration with your rear axle system, ensuring perfect alignment and optimal load distribution. Manufactured with micrometric tolerances, they provide exceptional rotational stability and minimize energy loss throughout the drivetrain.
To push performance even further, Raceet® bearings feature reinforced polymer cages or high-performance PEEK cages. These advanced materials stabilize the rolling elements, reduce unwanted vibrations and improve heat management under extreme racing conditions. The result: smoother operation, longer lifespan and uncompromising reliability, whether you're racing in KZ, OK, Rotax or pushing hard in intensive practice sessions.
Top 3 reasons to choose RACEET® for your Tony Kart Racer 401rr
High Precision & Quality
We select the highest quality raw materials for our ceramic rear axle bearings designed to be installed on your Tony Kart.
Mechanical Performance
Improved real dynamic performance, reduced mechanical stress on rotating components and easy installation.
Ceramic Solution
If we cannot find the correct bearing reference for your application, you can contact us and provide the dimensions you need.