Quote:
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Originally Posted by Ira Davis
class S type chains (whatever those are)
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"The restricted wheel well clearance in most of today's down-sized and front drive vehicles may require the use of SAE class "S" tire chains, as noted in the vehicles' owners manual."
"Class "S" is a minimum clearance requirement set by some vehicle manufactures."
http://www.tirechain.com/sae.htm