Forgot to update this, turns out the seatpin had just been over tightened at some point. Once i took it out and bent it back slightly the 25.4 had fair bit of wobble. Guessing it 26.something but unsure as dont have range of sizes to try.
@Koi 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.
Forgot to update this, turns out the seatpin had just been over tightened at some point. Once i took it out and bent it back slightly the 25.4 had fair bit of wobble. Guessing it 26.something but unsure as dont have range of sizes to try.