[offdawalley]

i bought an 06 dirtbag from transition about a year ago and on their website they said it needs a 28.6 seatpost which was way too big, 2 of my friends got the same bike and had the same problem, has anyone else encountered this? what size do you use? transition is now saying that my seat tube might be underreamed, but my bnike came like this. any feedback? thanks.
-Nick

 

[Dr Phil mmkay]

I've got an '06, it is a 28.6. I bought a 27.2 Thomson post and got the 27.0-28.6 shim for it to fit.