Originally Posted by geezerwheels

Does anyone know of any data to compare various hubs, and how much resistance increases with wear? I think there is more to it than spinning your wheels when the bike is on the stand.

Originally Posted by cxwrench

Nope, very very very very little resistance for anything but the most worn, filled-with-sticky-dirty-old grease bearings. Very very very little difference between loose balls and good cartridge bearings. Same with ceramic bearings. Almost all are hybrid (ceramic balls, steel races). They are engineered for very high rpm (not a bicycle), clean/hot (not a bicycle) and a pure radial load (definitely not a bicycle). The reason you seem them spin like crazy in videos is because they have no-contact seals and no to maybe a little super thin grease.