Gosh, thanks for the seatpost diameter! The tube opening does seem to be a bit oval (reading 25.x in parts). I will give 27.0 a go then!
Also did you consider brazing disc tabs on? I'm planning to turn this into a touring bike!
Hi, sorry to jump into this thread. I just came into possession of a lovely 94 Bear Valley SE - same as yours, sans seat post.
However I cannot figure out what inner diameter the seat tube has. Caliper gives me 26.4 to 26.6mm variations on the measurements depending on how I measure it and the...