The topeak defender m2 rear mudguard has a 2 pivot arm for improved coverage and a perfect bike fit a stiff engineering grade plastic support frame is co moulded to a softer and more flexible material at the trailing edge for greater durability topeak defender m2 rear mudguard features two tone injection moulded nylon construction quick release for front and rear seatpost clamp fits 254mm to 349mm lightweight 190g front and 230g rear