The goBILDA mecanum wheels are packed full of conveniences you won’t find in other brands. Each wheel has rollers which are supported by ball-bearings so that they rotate with ease. The black anodized aluminum side plates sandwich a beefy plastic wheel-center. The wheel-center possesses the goBILDA 16mm bolt pattern and 14mm center hole. This makes it easy to mount to a hub, goTUBE or component of your choice. To provide mounting options, the wheel-centers are offset so you can flip the wheel to change your robot’s track-width. The aluminum plates have a center bore of 32mm so that when the wheels are mounted on a 32mm component, such as goTUBE, the aluminum provides additional lateral support. Each wheel is assembled with M4 hardware on the goBILDA 32mm pattern, leaving 4 holes unused on the 32mm pattern. This set contains two Left Slant Mecanum Wheels and two Right Slant Mecanum Wheels.