What parts do you need to build a fixed gear bike?

Answer 1

The parts to build a bare-boned fixed gear you need:

1. A bicycle frame with non-vertical rear drop outs. Google "vertical drop outs" and then "horizontal drop outs." Horizontal dropouts are necessary to tension a chain.

2. A rear wheel with a track hub. These are threaded so that a special fixed gear cog threads on, and then a lock ring threads on in the opposite direction to keep the cog from coming undone while you are riding.

3. A cog and lock ring as described above

4. A bottom bracket and/or crank which will allow you to make a straight chain line from the cog to the front chain ring. This is important both for efficiency and safety reasons. By moving the chain ring closer/farther away from the bottom bracket it may be possible to make the chain go in a straight line from the cog to the chain ring. However, it may also be necessary to get a shorter bottom bracket spindle to bring the cranks and chain ring closer to the frame.

5. The other parts. Namely, a seat, chain, chain rings, seat post, stem, headset, handlebars, pedals, cranks, front wheel, inner tubes, tires, etc.

Riding without brakes is unnecessarily hard on your knees and I'd recommend against it. AND MAKE SURE YOUR LOCK RING IS TIGHTENED DOWN!

Answer 2

# find a frame with horizontal dropouts # buy a rear wheel with a track hub # put wheel in frame # adjust chain length and tension # ride.

Answer 3

There's usually little advantage to building a bike from scratch, as bike parts are much more expensive bought separately than as a whole package. IF you want a dirt bike, go buy one.