Valbrona wrote:I expect to find plastic collars on a seatpost holding a light on. Not on a BB axle. Would have thought a metal arrangement would have been obvious.
There's not supposed to be any significant force on that plastic adjusting ring- deep groove ball bearings can't take much preload.
That said I put angular contact bearings in my Epic (PF30). Those can take and should have significant preload. And the plastic collar is handling that fine.
So I'd say it's sufficient.