Titan Alloy Square Link Tire Chains 4 Link Space Skid Steer 8mm 8-16.5. Size based on NACM Specifications. Ladder Square Link Alloy 4-Link Spacing. How many tires does this cover?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.