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Wheels come in many different designs and usually fall into two
categories: stamped sheet metal and machine castings. Some wheels are
a combination of the two.
Usually cast alloy wheels are higher priced, but have greater
strength than stamped sheet metal wheels. Stamped sheet metal wheels
are the most common, because they are less expensive to produce and
are adequate for most uses. Some cars have wire wheels which consist
of three basic components; inner rings, outer rings, and a series of
spokes which connect the two. Cast aluminum wheels are very popular,
magnesium wheels are also popular. Both are popular because they are
light-weight and strong.
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