Ha! I discovered this as well last fall! I used the DUB plastic cups in a RaceFace BB for a while, worked just fine although it didn't seal perfectly. Great emergency solution.
I think the reason for the reliability of DUB BBs is in the seal. Bearings wear out because of water ingress, not use.
April 10, 2021, 8:42 a.m. - Thunderbear
Ha! I discovered this as well last fall! I used the DUB plastic cups in a RaceFace BB for a while, worked just fine although it didn't seal perfectly. Great emergency solution. I think the reason for the reliability of DUB BBs is in the seal. Bearings wear out because of water ingress, not use.