0

From where I live (Philippines) , there seems to be no stock for 26.8mm seat posts. All other sizes are available except for 26.8mm; they don't even sell shims for that size. Currently I am forced to use a 25.4mm seat post on my bike.

Is it possible to use a 25.4 - 27.2 mm shim for that purpose? I've used beer cans and inner tubes for shims, but both options has led to the seat tube crimping as I tighten it down.

1
  • You would be better to get a shim of the correct wall thickness, You need 0.7mm thickness walls - so a 27.2-28.6 shim would be better (might need to file it down so its small enough diameter) .
    – mattnz
    Nov 1, 2020 at 2:01

1 Answer 1

2

There are many different standards for seatpost size, and 26.8mm is one of the more-common ones. Its not rare.

I suggest you buy the right-sized seatpost. If your LBS won't order it, then look to buying one online.

A shim is a solution but as you found there are drawbacks too. Bodging a shim from a can is really only workable for 0.2 of a mm at most. More than that and you'd want a proper shim which is at least 100mm tall.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.