Topeak defender m2 rear mudguard defender m2 has an ultra secure quick release mounting system that easily adjusts from 25 the two pivot arm articulates for improved tire coverage and perfect bike fita stiff engineering grade plastic support frame is comolded to a softer more flexible material at the trailing edge for greater durability a highly polished underside helps prevent dirt build up and aids in cleaning features attachments slip joint clamp fits 254 34 9mm seatpost adjustable