Tamiya 15111 JR Round Hole Ball Bearing - precision gearbox upgrade for PRO MS chassis  [15111]

Overview of Tamiya 15111 JR Round Hole Ball Bearing

The Tamiya 15111 JR Round Hole Ball Bearing is an essential Mini 4WD part for racers focused on cleaner motor spin and reduced drivetrain drag. Matched to the PRO MS chassis, it supports consistent gearbox operation and helps maintain smooth rotation under load.

Fit and benefits for the PRO MS chassis

This JR round hole bearing is engineered to seat correctly in the PRO MS chassis layout, which commonly uses a double-shaft motor arrangement. Its fit helps stabilise the motor assembly and lowers internal friction during high rev runs.

On-track tuning and performance gains

When added as part of a lightweight tuning package, the Tamiya 15111 bearing can contribute to more efficient power transfer from motor to wheels. The reduced friction aids sustained speed and can make lap times more consistent in competitive races.

Installation tips for hobbyists

Fitting the JR Round Hole Ball Bearing is straightforward for both newcomers and experienced builders. The round hole design makes alignment in the gearbox simple, and a secure seating ensures the motor shaft stays supported during running.