Should be ok. A 5 to a 7 wouldn't work, but a 7 to an 8 should be fine.
@!Nhattattack! 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.
Should be ok. A 5 to a 7 wouldn't work, but a 7 to an 8 should be fine.