These aluminum cups and bearings are so much better than the plastic crapperware of other brands. I put them in the freezer 30 minutes before installing and they slid right in with no lubrication added (avoids squeaks while riding). They have been flawless with over 500 miles so far. The bearings seem to be exccelent as well. This product is the best BB86 bottom bracket I have ever tried, and it is very reasonably priced. Highly recommended!