This really is a limited-edition form of the popular 19mm roller and its own exterior synthetic rings are available in orange color. The 5-spoke rollers are produced from lightweight, tough aluminum, sufficient reason for integral ball bearings, they supply a smooth ride.
Rollers are employed in Mini 4WD machines allow faster cornering speeds with reduced speed loss. 19mm may be the largest roller available, making many Mini 4WD machines since wide as legitimately allowed using official Tamiya guidelines.