Titan Truck Tire Chains V-Bar CAM Type On Road Ice/Snow 7mm 37x12.50-18. Size based on NACM Specifications.How many tires does this cover? V-Bar for extra traction on ice. This tire chain set may need some fitment adjustment since tire chain manufactures make their chains fit more than one tire size and they could be slightly long and may need the side chain shortened. Gaskets / Sets & Seals.