The only mention of what their specifications are is this I think
You don’t need any specialist equipment to start, as long as your bike is safe for yourself and others
@Stu_F 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.
The only mention of what their specifications are is this I think