English cartridge was put in my Motobecane BB
A few months ago, I bought a Motobecane. I took it to the LBS & asked them to diagnose & repair a creak. They decided the BB needed replacing, and put an English-thread Shimano cartridge BB in. (They didn't know about Swiss threads although I pointed it out when I took it in.) It seemed to be crooked, so, another LBS chased the threads and put it in straight. Dozens of miles and several expert opinions later, it seems to be working fine and expectations are it should maybe go on working fine. (Sorry can't give you a higher-mileage report.) The expectation that it will continue to work well (even though the French/Swiss diameter is slightly larger than English) is because there's less axial load with a cartridge BB than with a cup-and-cone. See thread: Swiss BB may not be totalled (was: LBS wrecked... the french BB threads)
I didn't mean for it to be done that way, but if it works, then fine.
On the way to reaching this conclusion, I asked & searched opinions about threadless BB's. They're troublesome, don't stand up to serious use, was what I read & heard.
Phil Wood makes (or made) a Swiss BB cartridge, but it's expensive.
Last edited by duffer1960; 09-24-06 at 04:33 PM.