Rotor QXL Oval rings plus Dura Ace Adapter set in
These have covered 300 miles, so very little use. They do make a difference and do help with climbing and sprinting. These are for 110BCD 4 bolt cranksets. I can also offer a set of adapters that used with the Dura ace crankset, make for a flush finish. These cost me £ with the adapters. I have many other premium items available such as a full Dura Ace groupset, 3T Aeronova bars, a Cervelo S frameset and 3 sets of carbon tubular wheel sets all in excellent condition.