flash Retrobike Rider Jun 6, 2018 #1 I'm building up a P29 frame. On a sliding dropout frame, can I fit an IS mount calliper? If so what size (without an adaptor) rear disc rotor should fit??? 160 seems too big, 140 too small……
I'm building up a P29 frame. On a sliding dropout frame, can I fit an IS mount calliper? If so what size (without an adaptor) rear disc rotor should fit??? 160 seems too big, 140 too small……
flash Retrobike Rider Aug 12, 2018 #3 Cheers, an adaptor cured the problem. I'm not a natural disc brake user so get confused easily.....
