Originally Posted by coffeecherrypie

I have an '86 Centurion Ironman (the red and white one) that I've put modern components on. Wheels and drivetrain are now black, seatpost and cockpit are not. I think it would look better with all black components. The issue is the seatpost. I prefer two-bolt seatposts since I am anal about my saddle angle. I also need some setback. The bike takes a 27.0mm seatpost. I cannot find a black 27.0 two-bolt seatpost with setback--Thomson apparently only makes a 27.0 with zero setback, even if they did make at 27.0 with setback I am right on the edge of it not working with the way they angle the seatpost.

SO--to my question. I have heard one can ask a shop to ream out a seattube to go from 27.0 to 27.2 ID. On the scale of not an issue at all to a horrible idea, where is this? Frame is not a showpiece by any means, it gets ridden a lot, but by the same token I would be sad if this lead to its demise.

EDIT: also just curious: *why* is this bike 27.0? Is that just how Tange tubing of the time was? This has the Tange No. 1

EDIT #2 : just more context as to why I'm asking here....recently moved and so LBS and I are new to each other. I want to make sure I understand the risks if any, should they end up being the overconfident type.