Crank Length?

Momentum You need to think about your height and leg length as well, since that's the main criteria for crank length. People usually go a bit shorter on fixed gears than on geared bikes to minimise the risk of pedal strike and to be able to spin faster (since you can't change gear to stay at a steady cadence). I would say on a fixed gear that most people go for 165mm with people with legs longer than about 33" starting to go for 170s. Some companies do 167.5s which could be a happy medium.

Cheers, good information, I do happen to have (beautiful) long legs (for my height) - so maybe 170mm might be an option (?)

. . . wait, let me get a tape measure . . . .

How do you measure leg length ??

Is it the bottom of your foot (the floor) right up to the inside of the crown jewels ?