The Phil BB in question was installed correctly and ridden on a bike that only sees fair weather. The bearings wore prematurely and were crunchy and developed play in just under 1000 miles. Phil replaced the bearings under warrantee but I haven't used that BB since, so I don't know if the new bearings will last longer. But, considering the initial cost of the BB + the trouble have having to ship the BB back to Phil, I could have just as easily bought 5 other bottom brackets that probably would have each lasted many times longer.