You are reading a single comment by @Mr_Bump and its replies.
Click here to read the full conversation.
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
@Mr_Bump
what's your cassette out of interest?
I ran a 50/38 on a std 130 bcd with an 11-28 cassette which covers 119.9"-35.8"
a 50/34 compact with a 12-25 gives you 109.9-35.9 gear inch range. Whilst the jumps between sprockets are bigger at the lower end for the 11-28 you'll be able to utilise the 38 ring far more than the 34, the only useful mid speed ratio on that is in the 12/13 cogs.
If you do go compact, I'd suggest you get a 36 ring unless you are doing particularly hilly rides.
here's sheldon's online gear calc so you can work out what you need http://www.sheldonbrown.com/gears/