hmmm... my brain tells me it could work if your two ratios required exactly the same distance from BB spindle to hub. Not easy!
@provenrad 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.
hmmm... my brain tells me it could work if your two ratios required exactly the same distance from BB spindle to hub.
Not easy!