This small wheel features a machined aluminum hub with 2mm shaft with solid 28mm rubber tire.
The 28mm solid silicon rubber tire on this wheel provides a lot of traction for use with mini sumo robots and similar projects. The aluminum hub has a 2mm shaft with a set screw for attaching your motors.
This item includes one wheel hub, tire and set screw. An 0.050 hex wrench is required for the set screw.