Crank 20cm??? That don't sound right.
Normally there is a measurement stamped or printed on the inside of the crank near the pedal. Should read 165mm or 170mm or 172.5mm or 175mm (those are the most common lengths).
@adman 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.
Crank 20cm??? That don't sound right.
Normally there is a measurement stamped or printed on the inside of the crank near the pedal. Should read 165mm or 170mm or 172.5mm or 175mm (those are the most common lengths).