Ive a dolan track frame, plannin on courier work so no carbon!!!! Miche primato crancks, Dura-ace rear hub, running 48-13 gearing mavic rims etc... As an owner of a multi-speed racer i'd definatly recommend fixies they're just better and more fun and if you can make it up a hill u'll do it faster then you wud on a racer....!