Originally Posted by
bikingman
I have a double butted tube (Nova 650L 28.6OD 9x6x9) that I picked up for my bike's seat tube. I'm wondering if this is wrong. It seems incorrect to build a bike with a double butted seat tube, but I'm really unsure - the clamp might be enough.
Thanks in advance for any insight.
Im supposing there is a few tenths of a mm you can take out with an adjustable reamer when you're done & get a perfect seat post fit..
I used such a reamer on a 27.0 seat post frame , shaved just enough out to fit a 27.2 seat post in.. then stopped.
that was taking out about 0.1mm from the tube wall thickness..
Otherwise you'd have a 26.8 seat post in there (26.8 - 1.8)
( I still have a frame with 0.9mm straight gauge Aelle with a 26.8mm seat post.. I built 45 years ago..)
....