I bought 8 of these expensive bearing because I had terrible experiences with having rusting bearings and just decided that it would be best to get good bearings so that I would be safer when going 40 mph down a hill. The only problem that I have is that there are no shields to keep the sand and other things out so I usually have to rinse the bearings out after every run. They are also very noisy at a low speed because there isn't a cage so the teen ball bearings hit each other creating a tick which becomes a little annoying sometimes. If you need high quality bearings, these are for you.
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608 8 x 22 x 7 mm Silicon Nitride Silico
October 29, 2010
Tensioner roller for electric motorcycle drive belt. light load up to 10 000 rpm.