The Tamiya 94739 JR 19mm Aluminum Ball Race Roller is a limited edition upgrade built to sharpen your Mini 4WD's on-track behaviour. Machined from lightweight aluminum with a striking blue anodized coating, these rollers use 520 ball bearings to cut friction and keep rotation smooth for better line holding and consistent lap times.
These rollers fit standard Mini 4WD and Mini 4WD PRO chassis, making them an easy swap for racers wanting more precise cornering. The package contains mounting screws, 520 ball bearings, rubber rings and aluminum spacers to complete the install. Whether you are tuning for speed or tidying up the look of your car, these rollers balance durability and weight savings.
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