NTN R12-2RS 3/4" Hub Bearing - 1.625" OD - Oval Kart & Jackshaft

Minimizing rolling resistance and maximizing power transfer requires the highest quality go kart components, and the NTN R12-2RS 3/4" Hub Bearing delivers exactly that for competitive oval racers. Whether you are rebuilding a Buller Drive jackshaft or optimizing the backside of an extended right-front hub on a stepped spindle, this 3/4" ID by 1.625" OD bearing ensures zero-slop rotation. Oval karting places immense lateral loads on wheel assemblies, making bearing integrity a critical factor in maintaining corner speed. The dual rubber seals (RS) lock out dirt, track grit, and moisture, ensuring your setup remains frictionless heat after heat.

Integrating with Kart Racing Engines and Drivetrains

A high-performance bearing doesn't just keep the wheels turning; it directly impacts how efficiently power from kart racing engines reaches the ground. When used as a jackshaft bearing in a Buller Drive tube, the R12-2RS specification handles high RPMs without generating excessive heat or vibration. This ensures that your clutch and chain alignment remains true, preventing premature wear on your belts parts and drive system. Every fraction of a horsepower matters, and eliminating drivetrain drag is the easiest way to find extra speed on the straights.

Chassis Setup and Shop Tires Optimization

Your suspension and chassis geometry are only as good as the bearings supporting them. If you're currently browsing for a go kart frame for sale or tuning your existing chassis, upgrading your hub bearings is a mandatory step for structural rigidity. A failing bearing will cause wheel flutter, which destroys tire contact patches and ruins your handling predictability. Before you mount and balance new rubber from your shop tires inventory, ensure your hubs are packed with these precision NTN bearings to guarantee absolute concentricity. A stable hub means a stable tire, allowing you to push deeper into the braking zones and carry more momentum through the apex.

• Precision Dimensions: 3/4" Inner Diameter x 1.625" Outer Diameter perfectly fits extended right-front oval kart hubs.
• Dual Rubber Seals (2RS): Keeps out aggressive track debris, dust, and moisture for extended operational life.
• Buller Drive Compatible: Serves as an exact replacement jackshaft bearing for Buller Drive tubes.
• Low Friction Retainer: Engineered to reduce rolling resistance, translating more horsepower directly to the track.
• High Radial Load Capacity: Withstands the extreme lateral forces generated during high-speed oval cornering.
• Stepped Spindle Ready: Designed specifically for the backside of extended hubs utilizing stepped size spindles.
• ABEC-Rated Precision: Manufactured to strict tolerances to eliminate wheel wobble and vibration.