I'd like to know if I can use the Campagnolo Pro-Tech BB cups - intended for Ekar - with a Super Record crankset.
I'm led to believe Ekar and Super Record are both Ultra-Torque, but it's unclear whether this is a standard (same spacing etc) or just a reference to the hearth joint design.
Does anyone have any experience with this?
You will need both ProTech cups and ProTech bearings - the bearings are different - but yes, the Ekar ProTech bearings will fit in place of the SR bearings and will then mate correctly with the ProTech cups.
You will have slightly higher rotational resistance because SR bearings are CULT system and run on an oil film, wheras Ekar uses a standard steel-on-steel bearing with grease lubrication, plus the additional seals can drag more initially, than the lip seals used in the standard UT arrangement.
The sealing on ProTech is certainly more robust but it's arguable whether in road applications, compared to the standard SR arrangement, that is of great advantage because the CULT bearing system is extremely wear resistant (albeit at a cost ...)
Thanks for all the detail @gfk_velo; that makes total sense.
Looking at third party options, this one suggests that’s it’s also compatible with Ekar.
In practical terms, are the bearing dimensions different, to your knowledge?
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