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Registered
Join Date: Jan 2002
Location: Long Beach CA, the sewer by the sea.
Posts: 38,137
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In the case of helmets, technology improves over a 5 year period. I don't know how much belts can change over the same period, but they seem to go hand in hand.
Also, in race cars, the belts seem to get dirtier with oil, etc. than a passenger car belt. I've seen some nasty looking race car belts.
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