Originally Posted by
T-Mar
Campagnolo dropouts use 10mm x 26 TPI, mixed metric and imperial threading. SunTour and just about everybody else uses 10mm x 1mm. ...Installing the SunTour has reformed the threads, damaging them in the process.
Thank you. The Cyclone went on very easily as if it had been meant to. I had tried the Campy first and it didn't go. The fact is, I have no idea what this bike's history might have seen. It is the Belgian Bertin, English BB, 26.0mm seat post.
But waitaminute. I recall doing installing a 1st get Cyclone on the Masi for a test ride and it went on easily, and then a Campy NR which also went on easily. I've hung out around (and wrenched on) little furrin' sports cars all my adult life so I do know what forced threads feel like. On the other hand, the Masi's history is also largely unknown. Evidence point to it once having carried DuraAce brakes and Suntour bar-end shifters, so the derailloeurs could have been anything.