Mini 4WD 19mm Ringless Aluminum Ball Race Roller M4WD-40/PK by 3Racing  [M4WD-40/PK]

19mm ringless aluminum ball race roller in pink

This M4WD-40/PK 19mm ball race roller is machined as a ringless, lightweight aluminium option for Mini 4WD setups. The pink anodized finish gives a tidy appearance while the ringless profile trims mass at the outer edge to keep diameter compact.

Designed for experienced tuners who manage clearances and balance, the roller fits mounting points that take 19mm rollers; confirm your axle and bearing inner diameter match before fitting. The anodized aluminum surface resists light wear but will show abrasion with frequent contact against rough guides or guard rails.

For maintenance, check bearing seating and shaft runout after swapping rollers. The part is useful both as a visual upgrade for display models and as a lightweight option in a parts box where mass reduction is desired.