They probably just flap in the wind when you're at speed, like a pair of one winged sparrows, adding that extra touch of velocity.
@snowy_again 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.
They probably just flap in the wind when you're at speed, like a pair of one winged sparrows, adding that extra touch of velocity.