I've only had these bearings for a short time but the installation went as expected and everything fitted. I use this 608 Fit for the cassette side of the rear wheel on my Mavic Crossrides. The only catch was that I only ordered one of those smaller bearings and it turned out there were two on the side of the cassette. The bearings rotate well, quietly and smoothly. I will order more (at least 1 more).