Don't sacrifice vital fractions of time on the race track. Make sure that your Mini 4WD car runs as near to maximum efficiency as possible with the low-friction plastic bearings included in this option parts set kit. - Low-Friction 620 Plastic Bearings x5 - Low-Friction 520 Plastic Bearings x2 - 620 size parts are for use on hex shaft axles, while 520 size components are for use in Mini 4WD PRO car counter gears. - Compatible with Mini 4WD and Mini 4WD PRO cars.
