TL;DR - Can I (is it sensible to) ream out a 2007 Giant trance seat tube to take a 31.6 post? I think its 34.9 clamp size.
Was thinking about Gravity enduros next year and how Coed-y-Brenin was so pedally, then thought about how I have a 2007 Giant Trance frame in the shed doing nowt. Could be a good idea to race that for that round rather than my heavier sofa like 160mm Last Herb. 140mm Marz 44 rc3 ti forks/125mm rear travel would be just the ticket. My reverb is 31.6 dia though and the trance is 30.9. But. As the clamp on both bikes is 34.9 would it be possible to ream out the seat tube to take the reverb?
If this is all a bad idea I might sell the frame instead.