cartridge bearings on my xero xr-1 has failed. I'm looking to move to loose-bearing setup and eyeing the ultegra hubs with open pro rims.
I noticed that ultegra wheelset hubs look significantly different than the ultegra hubs sold by themselves.
Why are they different? Are one better than the other?
I weigh 165# and mostly do sports/recreational rides with weekend club rides.
Ultegra 6700 hubs
Ultegra 6700 Hub
Ultegra WH-6700
WH-6700