Mini 4WD PRO 13mm Roller Set with POM Bodies for Super-II compatible cars - Tamiya 15551 Jr  [15551]

13mm blue POM rollers designed for free spin

These 13mm plastic rollers from Tamiya serve as a compact, lightweight option for Mini 4WD builders focusing on multi-lane track performance. The rollers use a larger blue POM outer ring around a ball-bearing core, and aluminum inserts secure the bearings to the roller shell. This arrangement is intended to reduce peripheral mass while maintaining smooth rotation under load.

Versus older 13mm plastic-ring rollers, this set expands the plastic section and retains metal inserts to hold the bearings. The manufacturer reports weight reductions compared with certain aluminum ringless designs, positioning this item as a lighter choice where chassis balance and reduced rotating inertia are important. The kit contains two rollers and the screws for attachment, and it is compatible with Mini 4WD PRO and standard Mini 4WD cars.

Appropriate for courses where 13mm rollers are commonly used, such as three- and five-lane tracks, the POM surface lowers friction against lane banks while the ball bearings reduce internal drag compared with plain bushings. Aluminum bearing holders are intended to keep the bearings seated during impacts or lengthy runs.

In short, these rollers offer a bearing-equipped, lightweight plastic 13mm option for competitive multi-lane setups; final suitability will depend on individual chassis and track conditions.