Andrew R Stewart
Join Date: Feb 2012
Location: Rochester, NY
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Raleigh Pro, Trek Cycle Cross, Mongoose tomac ATB, GT Bravado ATB, JCP Folder
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The only real dissadvantages to caged balls, given the same ball count, is that the cage does take up a little space (less lube surrounding the balls) and could be installed backwards. The advantage is the ease of installation.
I've never seen any difference in the grade of the balls, in actual use. Other factors like how well adjusted the bearing unit is, is far more critical to livespan and spin. Andy.