Originally Posted by
BassistBiker
Mine is going to be 73.41 when it gets here....Going with a 18T will net me 65.13, so maybe a change to the 18T right away is warranted.
I think a 65-inch gear is a safe bet, but first try it out the way it comes. If you do change to a bigger rear cog, you might find that you need to adjust the chain length and/or brake pads, as the rear axle will move forward a bit in the dropout (aka track end). Don't let that discourage you from experimenting with gears, though. On my SSCX bike I run a 39 X 17, but it took some trial and error before I settled on that combination. If you get hooked on the singlespeed thing, you'll eventually amass a small collection of cogs and chainrings.