Originally Posted by
GeoKrpan
Don't mess with the seat tube until you try another 27.2 seatpost.
If it still fits tight you have a choice of enlarging the seat tube or trying a 27.0 seatpost.
I think I'd do the 27.0 seatpost.
Not sure why you're responding to the FIVE YEAR old original posters's question rather the followup one i asked just 1 post before your response when i revived this old thread?
But,.....the 27.0 post is still bigger than i need,....and not even made in that size for the Thudbuster i don't believe. (and bigger than the 26.8mm Thudbuster LT i have coming)
Regardless, i think .25mm can be done with mostly removing the paint/primer layer in the seat post tube.
....never heard of the "ball" type hone though,....thought a brake cylinder hone would be my only option.