I know most fixed gears are 48t for the front.
On project bike, my gears are 54-48. I'd like to keep the crank the way it is, and just remove the smaller gear. Why? Because the smaller gear is built into the larger, and you can't have the smaller with out the larger.
So, if I was considering a 48 - 17 (17/18 flipflop/fixedfree)
What woud be correct for a 54?
Or, can you give me the formula so I can caculate it myself?