Recommendations on SAE Class S Snow Tire Chains for 2011 Infiniti QX56 with P275/60R20 Tires  

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Expert Reply:

I would recommend the Glacier Cable Snow Tire Chains, item # PW3027C, for the P275/60R20 tire size on your 2011 Infiniti QX56. This snow tire cable chain is a SAE Class S type chain.

A SAE Class S snow tire chain means that the minimum sidewall clearance is .59 inches, which is 15 mm. So if a snow chain has an internal clearance of 15 mm or less they will be classified as a SAE Class S snow chain. The sidewall clearance is needed so that the snow chains will clear any part of the vehicle that is close to the inner and outer sidewall of the tire. The Class S snow chain is a common requirement on newer vehicles that have larger, low-profile tires.

I would also recommend the Glacier Rubber Adjusters, part # PW99, with the snow tire cable chains. These adjusters keep tension on the cable chains to provide a tight fit.

You will want to check your owners manual to see if there are any limitations on where to install the snow chains. The basic rule is that snow chains go on the drive wheels. On a 4WD vehicle they can go on just the rear wheels or on all 4 wheels, unless stated otherwise in the owners manual.

I am including a link to a FAQ page on snow tire chains.

expert reply by: Jeff D

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