I've got a 1x10 setup with a 11-40 cassette, compact road crankset and 38t wide-narrow chainring mounted as the outer ring. This works great, sure it's a bit noisy when it's on the 40t of the cassette, but nothing that gives me problems.
@Jaap 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've got a 1x10 setup with a 11-40 cassette, compact road crankset and 38t wide-narrow chainring mounted as the outer ring. This works great, sure it's a bit noisy when it's on the 40t of the cassette, but nothing that gives me problems.