Might be the older Flow, which is closer in internal width to the Arch EX than the Flow EX.
Flow - external width 28mm/internal width 22.6mm
Arch EX - external width 24.6mm/internal width 21mm
Flow EX - external width 29.1mm/internal width 25.5mm
It's the lesser-spotted albino Flow :)
@Howard 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.
Might be the older Flow, which is closer in internal width to the Arch EX than the Flow EX.
Flow - external width 28mm/internal width 22.6mm
Arch EX - external width 24.6mm/internal width 21mm
Flow EX - external width 29.1mm/internal width 25.5mm