Depends what ratios you want.
Either 42/28 if I use mid/inner or 44/30 if I'm using the outer/mid, probably prefer the latter as it'll work out slightly cheaper for me
If you go for outer/mid you might be able to replace your archaic 4-spline BB with a similar one but narrower, for a narrower Q, if you have clearance.
@atk started
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.
Depends what ratios you want.