Tamiya Mini 4WD 17mm Ringless Ball Roller M4WD-31/LB by 3Racing  [M4WD-31/LB]

Ringless 17mm aluminium ball race roller M4WD-31/LB for Tamiya Mini 4WD

The M4WD-31/LB from 3Racing is a 17mm aluminium ball-type roller designed as a spare or visual upgrade for 1/32 Tamiya Mini 4WD kits. Its ringless construction and light-blue anodising give a compact profile that suits tidy, display-ready chassis.

The aluminium housing contains internal ball elements to reduce rotational drag compared with standard plastic rollers. The ringless format removes the usual external flange, which changes how the roller interacts with stabiliser plates and side guards. Always confirm post diameter and mounting hardware compatibility before replacement.

Fitment is aimed at performance Mini 4WD chassis accepting 17mm rollers. Typical checks include shaft/post diameter, spacer stack, and plate clearance. This entry is not intended as upgrade guidance for Wild or Scale Mini 4WD types, which have distinct design limits.

Care notes: keep the roller clean and use a light bearing oil on the internal balls when necessary. The anodised light-blue finish is decorative and will show wear from repeated abrasion or solvent contact. Ensure spacers and screws do not bind the ball assembly on installation.