In a message dated 1/16/2004 7:21:05 PM Eastern Standard Time, gillies@cs.ubc.ca writes: super course was never double butted. however, if i remember correctly single butted means butted only at 1 end of the tube. it could always be possible that a bike was made with the unbutted part near the seat tube, shrinking the seatpost diameter. open up the lugs and flip the tube, and you might have a 27.2 diameter frame ?!?!
- Don Don. Thanks. I (and probably many others) are trying to make sense of your information. I am missing something on 'flip the tube and open the lugs'
If the unbutted part were at the seatpost insertion , wouldn't it be LARGER in the inside dimension.By BUTTING a tube, it gets thicker, and the thickness is added to the inside, not externally (at least in those days)
Larry Black
Mt Airy, Md.