The Tamiya 15398 Double Aluminum Rollers (13-12mm) are built to refine the handling of Mini 4WD models. They suit drivers wanting a reliable upgrade to improve turning consistency and track control.
The design stacks a 12mm roller above a 13mm roller to spread contact forces during cornering. This arrangement stabilises the car through bends and helps maintain momentum. Aluminium parts resist wear while keeping weight down for quicker responses.
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