Probably a 15t for the pursuit? I'm not very good with track gearing.
Yeah, I can't imagine anyone makes 27t cogs but with a 64t chainring thats what you'd need to get between 60 and 65 GI.
@umop3pisdn 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.
Probably a 15t for the pursuit? I'm not very good with track gearing.