What are S rated chains?
If you have a passenger car, you have to purchase snow chains that carry an SAE Class S rating. The rating means that these chains are meant to be used by front-wheel-drive cars with low ground clearances. The best snow chains for trucks may not be the same for small cars.
What are Class S requirements for snow chains?
SAE Class S This Class is applied to regular (non-reinforced) tire chains and cables for vehicles with restricted wheel well clearances. It has a minimum tread face clearance of 1.46”/37mm, and a minimum side wall clearance of . 59”/15mm.
What are Type S snow chains?
Class S tire chains are designed for use on vehicles with restricted wheel well clearance. I have attached a photo that shows the areas where clearance for Class S tire chains is needed. For the A dimension a minimum of 1.46inches (37 mm) between the top of the tire tread and the wheel well is needed.