350mm Black 3" Deep Dish 3-Spoke PVC Leather with Red Stitching Steering Wheel+Black Ball Bearing Quick Release Frame is made of high quality light-weight aluminum and is wrapped with PVC leather 3" Deep dish design; 350mm diameter Quick release kit made of high quality aluminum. 6-hole design Quick release allows ease of releasing of steering wheels by push pin. Durable ball bearing type. Adapter hub thickness: 2.25"; Diameter: 3.5" Universally fits with any standard 6-bolt racing hub adaptors (e.g. Nardi, Personal, Momo, Sparco,?etc.)