To fix or not to fix THAT is the question

flickwg [sarcasm]

if its your first ever go on a fix go for 50 : 14 without brakes and make sure you choose a very hilly route

[/sarcasm]

and don't forget to take the brakes off...

ok, jokes over...

whatever MrSmith said. you might want to try a little bit higher than 73 since you're used to pushing big gears. and depends on your crank length as well - shorter cranks are better for spinning at lower ratios. i currently run 165mm cranks with 46x19 (approx 64 gear inches) as my winter gear - it keeps me warm. will run a higher one when the sun's out.