Zipp 30 course clincher disc road wheelsetthe zipp 30 course clincher is fast so fast that it will get you where you are used to going faster the strong and aero designed aluminium rim is effective for races gravel adventures cyclocross and training rides features materialaluminium hub rim tubeless readyyes hub model77d front 177d rear hub width100mm front 135mm rear rim outer width26 4mm rimaluminium tubeless clincher rim depth26mm spokessapim cx ray spoke hole count