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A serpentine belt typically has 6-8 small V grooves that similarly would "bunch up" when bended.

When I went to a high output alternator I had to go to dual V belts to stop the squeal. Perhaps avoiding squeal is why CVF uses an 8 rib belt vs a more typical 6 rib.
CVF also has a line of 6 rib pulleys and belts sold under the "Spartan" label on their ebay page. kip
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