This OSPW System features a set of 17-tooth aluminium Pulley Wheels, available in red, black, or limited edition colours and in a specially designed polyamide (PA) and carbon cage. Compatibility covers Shimano Ultegra (6700/6770/6800/6870) and Dura Ace (7900/7970/9000/9070) 10s and 11s, electronic and mechanical group sets. The OSPW System for Shimano fits up to 28t on most bikes.
