I'm on 48/18... that's a nice compromise for me - just over 70 gear inches. Lets me get up the hills in Richmond Park without grinding to a stop and enough resistance to nip around on the flats. With a bit of training I'll probably drop the back cog to a 17 in the spring. I'm a pretty average Joe when it comes to fitness, so if you're some kind of Ubermensch I guess you could take that up a bit. If you're relatively new to this (and at the risk of being patronising), I'd go along with the other comments about working on your cadence rather than stepping up a "gear" or two.
I'm on 48/18... that's a nice compromise for me - just over 70 gear inches. Lets me get up the hills in Richmond Park without grinding to a stop and enough resistance to nip around on the flats. With a bit of training I'll probably drop the back cog to a 17 in the spring. I'm a pretty average Joe when it comes to fitness, so if you're some kind of Ubermensch I guess you could take that up a bit. If you're relatively new to this (and at the risk of being patronising), I'd go along with the other comments about working on your cadence rather than stepping up a "gear" or two.