Originally Posted by
JohnDThompson
Stronglight made a roller bearing bottom bracket, way back in the cottered crank days. Two sets of rollers: one to handle axial loads, the other to handle radial loads. It never really caught on; reports were that it was very fussy about alignment.
https://thecabe.com/forum/threads/st...tation.247216/
roller bearings also introduce a lot of drag, compared to ball bearings.... and yep, getting that one above set up correctly would not be fun, especially considering MFG. slop and the ever-changing conditions bikes experience...
those thrust bearings are overkill, IMO.. a plain bi-metal bushing would be enough, i'd think.
the loading is more a twist than a side shift.
tapered rollers see-saw, or "slider rocker", under odd, twisting loadings, are expensive to make, need to be paired as an assembly. and are fairly high drag too.