The Tamiya 94955 JR 19mm Aluminum Ball-Race Roller Kit is a solid upgrade for Mini 4WD hobbyists aiming for reliable, low-friction rollers. Designed for the Japan Cup 2013, these aluminium units combine lightweight design with durable ball-race bearings to help keep speed steady through a variety of course layouts.
Protective rubber rings reduce scuffing when you touch the guard rails, helping parts last longer between rebuilds. The set includes two 19mm aluminium rollers, four spacers, two 2x8mm nickel screws, and two O-rings for an easy swap onto compatible chassis platforms.
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