I have a Dura Ace 2004 10-speed crank-set....but it's 172.5mm cranks. Regardless, and don't take this as a sales-pitch or be offended by my tone......there is NO WAY ON EARTH ANYONE CAN CONVINCE ME THAT 2.5mm difference is noticeable!!!!!!!! have used both sizes before and I can't tell the difference....no way on earth!!!!!
Stephen Perera
Gibraltar, Europe
graphics@gibraltar.gi