Ultra-Torque OS-Fit integrated cups BB30 68x42, No O-ring?

[Bridgeman]

Just received a set of Ultra-Torque OS-Fit integrated cups BB30 68x42 Cups, and have found they do not have o-ring grooves and o-rings. Perhaps Campy no longer uses them. Can't find any info out there and was wondering if any here has seen this as well.

[bikerjulio]

No, but I have to think they were redundant and Campy did away with them in the reworked version.

FWIW I have a set that I pressed in completely dry in 2010 into a Cannondale Supersix that have stayed rock solid. I don't think O rings had anything to do with that.

[Bridgeman]

Yes I agree that the o-ring may be redundant, but it largely relies on what sort of barrier takes its place. I believe its design intent was to keep water from entering the bearings from the inside. If the assembly is done with loctite then I doubt there will be a problem. Not sure about a dry press fit though.

Was kind of surprised as all forms of documentation that came with the box, including the photo on the outside and on-line/web site documentation shows the o-ring.

[ghisallo2003]

The O-rings sit on the outer face of the cup against the frame - so water bypassing them from the inside would actually end up on the outside of the cup and then frame, rather than at the bearings. Water from the outside could perhaps enter the frame this way but many anyway have access for water in / out of the bb area.

If anything I would suspect that the rings could interfere with a good interference fit between frame and cup, rather than contributing to it.