Originally Posted by
choddo
Kind of yeah, but the bearings and the way they rotate backwards because they’re not frictionless are a key element of the effect and they’re missing.
Not really, because the bearings are not on individual spindles like planet gears. Precession in a bottom bracket is ALL about
:
- the rotating radial load from pedaling, acting on...
- sufficient radial clearance between the threaded cup and threaded BB shell.
No-bearing example: Car wheels used to have left hand lug studs and nuts on left side due to precession. Tapered seat lug nuts eliminated the clearance required for precession and all cars suddenly had right hand lug threading on both sides. Heavy trucks that use flat-seat lugs still have left-left lugs, and even some with taper seats just to be on the safe side, in case non-taper wheels are mounted. Close-fit hub-piloting wheels also help.