These popular Double Aluminum Rollers (13-12mm) now come in a black finish.

The set includes attachment screws, nuts, and 520 bearings (4pcs.).

With current Tamiya Mini 4WD racing regulations, these double rollers are counted as one roller.

12mm upper roller and 13mm lower roller improves stability greatly and also assist cornering ability of your machine.

Friction is minimal when the rollers make contact with the course walls thanks to its aluminum material.

Can be used with any Mini 4WD and Mini 4WD PRO machine.