Oh, If it makes a difference, the outer ring is attached to the crank and the inner is allen key bolt on.
@treeman 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.
Oh, If it makes a difference, the outer ring is attached to the crank and the inner is allen key bolt on.