Recommended for those who are less likely to put on and remove wheels using quick releases, or those who usually often have a town-ride ride in town. Requires 5mm Allen key to attach or detach For motorcycle with rim brakes with front end width 100mm and rear end width 135mm Not compatible with disc brake vehicles. Front and Rear Set, Steel Shaft, Compatible End Width: 3.9 inches (100 mm) / 5.3 inches (135 mm); Weight: 2.5 oz (70 g); Product color may appear different from the actual product depending on your display settings, etc. Product specifications, logo design, etc. may be subject to change for product improvement. We also cannot answer measurements or personal fit that the manufacturer does not announce. Please be aware of