Wide bikes need BoostIt: Designed for rear frames of up to 205 mm and a tyre width of up to 75 mm Wide bikes need BoostIt: Designed for rear frames of up to 205 mm and a tyre width of up to 75 mm IMM (Integrated Mudguard Mounting) doubles as a means to attach the rack, and a mudguard. SnapIt accessory compatible Protected rear light mount