Switching out plastic bearings for the Tamiya 15034 ball bearing set is a straightforward way to lower rolling resistance and improve free-rolling behaviour. These metal bearings are built to tighter tolerances so wheels spin with less drag and reduced heat buildup under repeated runs.
The Tamiya 15034 set fits many Mini 4WD chassis types and is commonly used in race-prep and tuning projects. For circuits that favour top speed, reducing friction at the wheels can make a noticeable contribution to consistent lap performance.
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