JR 17mm Aluminum Ball Race Rollers, Tapered/Ringless

Guide a Mini 4WD with these 17mm ringless aluminum rollers. Tapered undersides help the car return to the track after contacting a wall, and built-in 520 bearings support smooth rotation.

Includes mounting screws and four aluminum spacers. Fits Mini 4WD and Mini 4WD PRO cars; some bodies require modification.