Thanks for the pointers upstart (and everyone else), have read Sheldon Brown's site a lot already, very informative.
I will stick with the 42/16 for a couple of weeks while I get used to riding a fixed gear, but will almost certainly change to a 13t cog, my commute is from Balham to Vauxhall, there is a lot of flat road and not that many lights... I can't see the benefit of my legs spinning around when the only disadvantage of having a higher ratio is having to stand up on the pedals when you start off or going up a hill.
Thanks for the pointers upstart (and everyone else), have read Sheldon Brown's site a lot already, very informative.
I will stick with the 42/16 for a couple of weeks while I get used to riding a fixed gear, but will almost certainly change to a 13t cog, my commute is from Balham to Vauxhall, there is a lot of flat road and not that many lights... I can't see the benefit of my legs spinning around when the only disadvantage of having a higher ratio is having to stand up on the pedals when you start off or going up a hill.