Originally Posted by
spRICE
Hah I would go 48x17, but I don't have a proper lock ring tool

. Mine is one of those pedal wrench, lock ring, chain whip combo tools. It's a nonfunctional multifunctional tool. I need to get a Hozan from Scrod.
edit: Also, if it matters, I haven't ridden fixed in about 3 months.
48x17 is what I'd go with too but if you are unable to switch out, I'd do 48x18. 48x16 would put you at like an average RPM of like 70 or so I think? 48x18 might be a bit spinny on the downhills but it wont suck when you go up hills.