The Tamiya 94859 JR 13mm Aluminum Ball-Race Rollers combine anodised aluminum bodies with 520 ball bearings to provide smooth, low-resistance rotation. Their 13mm diameter gives consistent contact behaviour at guide points, helping manage speed loss when running close to track walls. They are versatile components suitable for either front or rear installation.
Finished in blue, these rollers suit both Mini 4WD PRO and classic Mini 4WD chassis, offering a tidy visual upgrade alongside practical benefits for hobby racers seeking predictable handling.
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