The bike is a 80's road conversion so it was originally made for 27'' wheels. It as a pretty good geometry since I weld track dropouts to make it tighter with 700. The top tube is going down toward the front of the bike, like 8 degrees with a 700 fork. And the head tube is something like 7 degrees And is very very short for a 54 cm bike, it is like 9-10 cm long. The old fork was an 27'' bent fork, not very good. A straight blade would fit on it and would be prefered to have the front wheel as close as possible to the frame.