The new road racer mk3 incorporates a unique superfast fixing system and has been widended to accomodate tyres up to 38c weighing in at only 260 grams the pair they fit to most 700c bikes including both disc and caliper brakes features 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 require mudguard eyelets to be