Product DescriptionSuper Z6 was designed by SCC for cars, trucks, and SUV's with restricted clearance around the drive tires. Based on SCC's experience with other products in the "Z" family, Super Z6 has one very special quality: it will operate in less than half of the space required by most cable chains and tire chains. Super Z6 requires only 6mm (1/4") of sidewall clearance to operate. The diagonal pattern provides constant traction, aggressive starting, stopping, cornering and ensures compatibility on vehicles equipped with traction control and electronically monitored brake systems. Traction coils, made from alloy steel are more durable than conventional tire or cable chains. A split outside cable with two fastening positions allows for easy installation without moving the vehicle, and there's no need to stop and retighten. Most cars, trucks and SUV's manufactured since the late 80's will have special clearance requirements. Don't be fooled by the appearance of the tire positioning on your vehicle. Traction products not only have to fit the tire, but must also fit within the space provided around the tires. Most issues are hidden from view as they are behind the tire near braces, suspension parts, strut housings, splash guards and fuel and brake lines. More information should be located in the owner's manual under chains, traction devices, tires or similar heading. It is important to select a traction product that is compatible with the minimum class assigned to your vehicle. The class assigned to your vehicle is based on the original tire and wheel size shown in your owner's manual. Using a different size tire may affect the chain's ability to operate properly. Some owner's manuals state that certain tire sizes do not provide enough clearnace to accommmodate winter traction products. The fact is, many of these vehicles can use SCC's Super Z6. Trying to measure the nearest obstruction under your vehicle could prove tricky.Amazon.comThe SCC Super Z6 SZ451 winter traction product offers superior performance for pickups and SUVs with very limited operating clearance around the drive tires. Be ready for winter driving with an innovative solution that is a step beyond traditional tire chains. New Design Based on the "Z" family of products, the Super Z6 is designed for vehicles with restricted clearance around the drive tires. The Super Z6 requires only 6.33 millimeters (.25 inches) of sidewall clearance to operate, less than half the space required by most cable and tire chains. A diagonal crossmember pattern provides better outstanding traction and durability than conventional chain systems. Easy to Install A split outside cable with two fastening positions allows for easy installation without moving the vehicle, so there's no need to stop and retighten. The traction coils are manufactured from alloy steel to increase the lifespan of the product. The Super Z6 is also designed to prevent scratching of alloy or high performance tire rims. Versatility The Super Z6 is available to fit pickups and SUV tire sizes. It offers a unique combination of performance and convenience features for every user, including a "designed-in" rubber tightener, better all-around traction performance than conventional tire chains or cables, and greater durability. Designed for High Performance The Super Z6 has better compatibility with anti-lock brakes, traction control, all-wheel drive, and other electronically monitored control systems so as not to interfere with the normal handling characteristics of your vehicle. The unique design also offers a low potential for damage to vehicle body and mechanical components, even when abused. The Super Z6 SZ451 is designed for tires sizes from approximately 31x15.50-15LT up to 345 millimeters. Check the manufacturer's website for the exact product to fit your tire size. Also check your owner's manual for clearance specifications before installing winter traction products. What's in the Box Chain