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/
I imagine it would be fussy, we repeatedly see (thanks Hambini) that even modern high-tech manufacturers can't get their bottom brackets straight and concentric. I do wonder why they went for doubled-up bearings rather opposing tapers, maybe just the availability of standard bearings that would fit, or perhaps the separate axial and radial bearings were lower friction.