I'd consider the price difference between replacing the rear mech and cassette, or simply going to an 11-27 (increase of roughly 10% ratio when going from 12t to 11t) and then dropping your tooth count up front.
@rodabod 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.
I'd consider the price difference between replacing the rear mech and cassette, or simply going to an 11-27 (increase of roughly 10% ratio when going from 12t to 11t) and then dropping your tooth count up front.