Old Grease guard Square taper BB seems to Keep working,

My Touring Rig was Built in Eugene, of 89~90 Burly tandem parts Its Oversize bearings

normally went in Auto clutch Throw-outs so the Bike is a low stress app.

(+ It's got a whole lot of grease between the bearings as the shell has no holes in it. other than the Zirk and the bearings in the ends of the Tube. )


But if the parts have to be the latest offering, 11 speed Etc. , External BB is what you get.. its part of the package.