By combining our High Modulus carbon fiber with the same wind-cheating design of our DA we are able to offer the B12. We add an aero fork, bar and extensions, and deep-section wheels for a complete aerodynamic parts package. Shimano’s Ultegra SL parts blend pro-level performance with outstanding value to make the bike an easy route to your best performance.Frame:Felt HM Modular Carbon Fiber Frame with 3KP Finish. Forged Horizontal Dropouts Fork:Felt 3.2 UHM Aero carbon fiber Components:Shimano Dura Ace/Ultegra SL, 20 speed; Felt Bayonet Integrated Aerobar w/ ƒ bend extensions Wheelset:Felt TTR3, 40mm deep aero rims, 20H front, 24H rear Finish:Gloss Silver & Clear Carbon Sizes:650c x 50cm, 700c x 52, 54, 56, 58cmWeight:19.62 pounds/8.92kg