What a beauty. I modified everything on this bike. The headset is a modern conversion to use a threadless stem. The bottom bracket is a conversion to use a square tapered crank. The front wheel is 650c, which required special and rare long reach center pull brakes using a pulley system. The rear brake is Cervelo, I invented a piece shown below to outfit a 700c wheel in a 27" frame, using a cantilever brake arm cut down with a special cup and cone nut to keep it from slipping. The rear wheel has a saucer design on the single speed cassette conversion, fabricated custom just for this bike. And also track bars.