I think that's why there's always a disclaimer like "errors and omissions...etc..." IMHO it's 26.4 mm
@Dutch_Cheese 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 think that's why there's always a disclaimer like "errors and omissions...etc..."
IMHO it's 26.4 mm