Tamiya M03/M03L/M04M/FF02 Ball Bearing Set (2RS) by 3Racing M04M-05  [M04M-05]

Ball bearing set overview

This is an RC-scale ball bearing set produced by 3Racing for compatibility with Tamiya M03, M03L, M04M and FF02 platforms. The kit is identified by 2RS in the name indicating sealed bearings, and it is intended to replace worn factory bearings to restore rotational smoothness in wheels, differentials and shafted components common to on-road touring chassis.

Use this set when the drivetrain shows increased drag, rough wheel spin, or noise originating from hubs or diffs. Bearings improve measurable runout and help maintain consistent handling by reducing binding in rotating assemblies, which is especially useful when fine-tuning rolling resistance and balance for track or street sessions.

Installation notes: bearings of this type are typically pressed into hubs, carriers and gearbox housings. Take care to align the bearing squarely before applying even pressure, and avoid levering against seals. After fitting, check free spin and endplay at each installation point, and inspect seals for damage to maintain longevity.

Maintenance: sealed bearings require less frequent servicing than open types, but periodic inspection and replacement are still recommended if you notice roughness, play or grease leakage. Replacing bearings is a straightforward way to reduce drivetrain losses without changing gear ratios or suspension settings.