Tamiya Mini 4WD Ringless 9mm Aluminium Rollers - M4WD-29/LB by 3Racing  [M4WD-29/LB]

M4WD-29/LB 9mm ringless aluminium race rollers for Tamiya Mini 4WD

This M4WD-29/LB product is a pair of 9mm ringless aluminium ball race rollers designed for use on Tamiya Mini 4WD chassis. The rollers use a ringless bearing setup and come in a light blue finish, offering a lighter outer profile compared with conventional ringed rollers. The following text covers fitment, materials, and practical notes aimed at experienced hobbyists.

Fit notes: these 9mm rollers are made to fit standard Mini 4WD roller posts. The absence of an outer retaining ring reduces collar mass and changes how the roller locates on its axle and spacers, so expect a different amount of axial play than with ringed types. Confirm your post diameter and spacer stack before fitting.

Materials section: machined aluminium body and a light blue surface treatment are consistent with common aftermarket rollers. Described as aluminium ball race rollers with a ringless arrangement, they suit builds where colour matching matters and can influence rotational drag and handling due to altered contact patterns.

Maintenance advice: keep bearings and adjoining surfaces clean and dry, replace any bent axles, and fine-tune lateral play with thin spacers rather than force. Treat these as upgrade parts and check compatibility with your roller stay geometry and existing bearings or bushings.