Roadracer mk3 guards pair the crud roadracer mk3 mudguard incorporates a unique super fast fixing system and has been widened to accommodate tyres up to 38c weighing in at only 260 grams the pair they fit to all 700c bikes including both disc and caliper brakes roadracer mk3 fits almost any brand of road bike with tyres up to 700x38c super strong duotec interlock fixing system for trouble free attachment to your bike no tools needed suits all brake systems discs and cantis does not re