On Monday, June 10, 2019 at 9:54:33 PM UTC-7, James wrote:
On 11/6/19 1:40 pm, jbeattie wrote:


BBs have gotten more attention than any other frame component in the
last 10-15 years. https://wheelsmfg.com/bb-standards Too much
attention. They should have gotten less attention. And before we
changed the shells, we had to cycle through ISIS and Octalink. I
think we hit the pinnacle with Shimano $16 outboard bearings in a
threaded BB with a Hollowtec crank.
https://www.jensonusa.com/Shimano-BB...Eg rQYdKwAN1A
Or a Campy equivalent if you're into Italiano.


Campagnolo UltraTorque BB & crank design is *the* pinnacle of
development as far as I am concerned. If there was never another BB
assy, I would be happy to use the UT design ad infinitum.

A little complex from my standpoint, particular with the tooling needed to replace bearings, but the threaded cup is a nice idea. The problem with fretting and spindle wear has never materialized for me with Ultegra or even 105 cranks. I'd be curious to know if it has been a real problem. With BB 30 and similar press-in formats, there is no rigid connection between the bearing and spindle, and it seems to work.

-- Jay Beattie.