| http://www.w3.org/ns/prov#value | - They will not last the life of the hub - in the case of the open bearings, to some extent they do - they may use a partner to actually make the parts in some cases (SKF make their Cronitect bearing surfaces, for instance) but other than in the case of some of their caretridge bearings, they do not generally use a straight commercial unit.
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