Well BITD 92 yes they did fit. Don't know when they changed the design to fit only canti's. Sorry not much help. If he can unscrew the boss then that anther option. The only option kits i found for 07's was an elbow that screwed to the bottom of the body of the that then rested against the frame, but still only for canti. Their is a Magura fan site which may know. the link to this site is in a post on retrobike site.