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old seat post is 30.9, spotted a possible replacement with 30.8mm. will it work?
Tape around it?
Diferent I know but I just fitted a 34.9mm QR clamp to my 35mm frame tube so that I can drop the saddle quickly - bike came without a QR.
Seems OK - frame hasn't cracked yet?!
Tape around it?
Different I know but I just fitted a 34.9mm QR clamp to my 35mm frame tube so that I can drop the saddle quickly - bike came without a QR.
Seems OK - frame hasn't cracked yet?!
Well I got an old 27mm thomson in a 27.2 seat tube and the 2mm def makes a difference as I have to crank it up quite a lot on teh collar and lowering it mean it drops suddenly. The latter you will prob find but clamping it up should be OK with a decent seat collar IMO 🙂
On One dont seem to think so. I think they use a metre rule to measure the seatube diameters on their frames!
Why put a 30.8 in it when 30.9's are more common anyway?
Does usually work, as long as it's not carbon & you've got a decent clamp, or they have a tendancy to slip
I got away with it. I'd gauge it by how loose it is in the frame, how expensive the frame was etc...
a seat collar is quite different
I got away with it. I'd gauge it by how loose it is in the frame, how expensive the frame was etc...
a seat collar is quite different
got away with it twice as well 😉
My old Holdsworth frame is probably 26.4mm, which isn't an altogether popular size these days. I have a nice NOS Kalloy 26.2 seatpost, which is OK so long as I winch up the clamp. Prob going to need to file the frame slightly to be able to get it a smidge tighter to prevent gradual slipping.