Originally Posted by
Jgarcia2020
I am looking to swap out my seat post on my 90's trek mtb,the manufacture states that the diameter of the seat tube is 27.5. As we all may know, bike parts are very hard to come by these days. I am wondering if I could go down some mm's and fit a 26mm seat post to my bike without damaging my frame?
What is the narrowest diameter seat post would you recommend I not exceed without having to resort to using a shim?
Thank you.
That would be possible, but in my opinion I would rather find a 27.2 (a very common size), and you could shim that easily.