As tester said, it's possible that a frayed cable causing it to not shift properly, very easy to remedy.
Just try and take it out completely, and shift again to see if it can go up to 10/11 without the cable.
see if it can go up to 10/11
I'd like to see a front mech which goes up to 11 :-)
@gbj_tester 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.
As tester said, it's possible that a frayed cable causing it to not shift properly, very easy to remedy.
Just try and take it out completely, and shift again to see if it can go up to 10/11 without the cable.