| 摘要 |
A wheel for shopping carts. The wheel has a unitary, polymeric hub with a pair of opposed bearing cavities. An annular tire supporting groove has a pair of sloped sidewalls and a base which includes several sharp ribs. A relatively thick rubber tire is held in the annular groove and is expanded and placed in the groove under tension so that its inner edge is deformed by the sharp ribs, thus holding the tire in place.
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