So... my seatpost needs to be 32.4mm but I gots 31.6mm.
It could be worse--you could have bought a 32.4mm seatpost and your seat tube could be 31.6mm.
@Oliver Schick 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.
It could be worse--you could have bought a 32.4mm seatpost and your seat tube could be 31.6mm.