My friend has a trek SU100 urban bike but has had the seatpost nicked. Does anybody know the size so I can get her a new one?

Mine is 31.6 but that’s on an EX. Not sure if all Trek’s use the same or not.

It’s the same frame as the 4000 Hardtail range in 2006-08.

31.6mm-just taken mine off to check.

Dam mine has some grease on it-now I know why it was slipping!

😆

Nice little urban machine-rebuilt mine with a Kona P2 and LX etc. They are heavy but handle really well.

Thanks for that Zaskar.

I have a used Trek seat post that will fit for sale if you’re interested, cut down to 270mm

Yours for £10 posted.

e-mail to alexb1636 AT yahoo DOT co DOT uk

cheers,

Alex