27mm on mine, not sure of year
Yes but be careful, some of the 2008 models were built with 27.0mm seat tubes and others 27.2mm. There's been discussions on this and other forums about this known issue.
Kind of suprised to see a 27mm. Mine was rusted and stuck but it clearly had "27mm" marked in it once I was able to remove it and sand thru all the crud.