Tamiya - JR HG Lightweight 17mm Aluminum Ball-Race Rollers, Ringless
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This is a lightweight 17mm aluminum ball-race roller set that is currently available to tune your Mini 4WD car. These rollers provide less weight and a slight boost in speed, as well as superior durability and silky-smooth rotation.
17mm Lightweight Aluminum Ball-Race Rollers x2 Eight holes in each roller make for an individual weight of 0.81 grams, a saving of roughly 0.25 grams per roller Attachment screws and spacers included Built-in 520 ball bearings provide smooth roll Compatible with Mini 4WD and Mini 4WD PRO cars. Some bodies may require modification