Grizzlar GTU-407 Garden Tractor 4 Link Ladder Alloy Tire Chains Tensioner included 18x8.50-10 18x8.50-8 18x8x12.125 18x9.50-8 9x9.50-8 4 link spacing for lower cost Manganese steel for longer durability. Chains only, tires not included. Sold in pairs. Can be turned around for longer life. Twist link crossmembers For deep lug tires we recommend our GTN-500 net style chains. Fits 18x8.50-10, 18x8.50-8, 18x8x12.125 solid, 18x9.50-8, 9x9.50-8 tires.