As a Japan Cup 2020 special, the Tamiya 95137 HG 19mm Aluminum Ball-Race Rollers feature a black anodised aluminium body and distinctive lettering. They are intended to enhance both the look and rolling efficiency of Mini 4WD cars without adding excessive weight.
These rollers use lightweight aluminium paired with 520 ball bearings to reduce rotational resistance. They fit standard front and rear roller positions across Mini 4WD and Mini 4WD PRO platforms, though some bodies might need minor trimming for the best installation.
During races they help preserve momentum through bends by lowering friction and improving stability at rail contacts. Their construction aims to withstand routine racing impacts and keep performance consistent over time.
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