These are our PRO-BR model bike racks, they can be fitted to almost any designed bike. They are a great way of carring a short board / mal safe and secure on your bike. These units are manufactured from stell and alumimum our design allows you to remove the two allumimum support arms from the carrier quickly and easily when not being used. The two alumimum support arms have eva foam where needed to protect your board from scratchers and board straps to lock your board into the rack