Laclede Single Mud Service Tire Chains are constructed to National Association of Chain Manufacturer specifications and are constructed with heavier duty cross chains and side chain compared to standard Highway Service tire chains. Mud Service chains are designed for off-road use and heavy duty applications. Product Features:TIRE SIZE: NR78-15, P245/70R15, P255/70R15, 255/65R15LT, 265/75R15, P275/60R15, 275/60R15LT, 30X9.50-15LT, 31X10.50-15, LR78-16LT, 7.50-16LT, 235/85R16LT, 9.50-16.5, 12-16.5, 7.00-17LT, 235/80R17, 215/75R17.5Manufactured to NACM specificationsTwist link case hardened cross chain5/16 cross chain link material diameterDoes not meet SAE Class S wheel well requirements