Sorting a frame if too small seat post been used?

[Osella]

I use 27.2 posts with shims on mine (got them on 30.0 and 30.4 frames) - LOADS of quality 27.2 posts about and makes it easy to swap back & forth between frames if needed..

Alu shims cheap & easy off the bay from Taiwan..

 

[LittleSkink]

thanks for that Osella

I have seen a couple of 27.2s that look nice, and as you say shims are easy enough to find - once concern I have is strength of 27.2s as I think (if memory serves me correctly ) that is a road bike size. Now I am not that chunky (ok maybe 12 1/2 stone on a good day) but have damaged seat-posts in the past with "enthusiastic dismounts"

 

[datmony]

27.2 is one of if not the most common size post used in high quality steel MTB frames. My Reparto Corse Martini Racing Bianchi, Bridgestone MB1s, Waterford 1400/2400, etc all run 27.2 posts. I also have a Indy Fab deluxe that has some damage done to it and IF bonded a custom fiberglass shim in the frame to take it from a 29.4 to a 27.2 and told me to never worry about it because it will last forever.

Soulcraft even provides a shim on their Option 3 to take it from a 28.6 down to a 27.2 to offer additional post selections.

You will likely find the ride more compliant too as the post will have a bit more natural flex.