Originally Posted by ski4bob

When I converted my '88 Premis the tubes were "slammed and squished" as you put it, although I'd say they were squeezed at the end to make them clear the other tubes in the bottom bracket. While this worked ok for old school BB's when putting in a modern Shimano 24mm bearing set I did have to take a Dremel tool to the tube ends so they wouldn't interfere with the threads of the bearing cups. However, my '88 Circuit (Columbus SL) has nicely mitered and fitted tubes in the BB area. I've also modernized an '87 Super Sport which is also Tenax but the tubes are also mitered not squished. So it seems to me that only the higher level bikes, Super Sport, Circuit, Prologue, Peloton got mitering and the lower ones, Tempo, Premis, Prelude, got squished.