Are you using clincher tyres on tubular rims?
I'm sorry for the silly question, but it just seems like either your rims and tyres are mismatched by type clincher/tubular, or by size - fitting a 28" tyre to a 27 inch rim maybe.
@GA2G 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.
Are you using clincher tyres on tubular rims?
I'm sorry for the silly question, but it just seems like either your rims and tyres are mismatched by type clincher/tubular,
or by size - fitting a 28" tyre to a 27 inch rim maybe.