The Tamiya 15522 HG 17mm Aluminum Ball Race Rollers are a precision upgrade aimed at racers who want reliable performance on time trials and club tracks. Machined from quality aluminium, they offer a durable matte finish and a compact, lightweight profile that works well with tuned chassis setups.
Each roller uses a 520 ball bearing at its centre to provide consistent, low-friction rotation that helps stabilise cornering lines. The kit includes two screws and four aluminium spacers for straightforward mounting on both Mini 4WD and Mini 4WD PRO chassis. Depending on body shape and clearance, minor bodywork trimming may be needed to fit the rollers.
Fitting these aluminium rollers typically reduces rotational drag and improves cornering predictability during competitive runs. Their solid construction is intended to withstand repeated track use while maintaining smooth performance lap after lap.
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