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Choosing Tires & Tire Tech For Your 4x4 Truck - Beefy Tire Tech Photos

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Siping is the process of cutting very small grooves, or "sipes," into the tread blocks. This gives the each block of tread additional gripping surfaces, which is noticeable on wet and icy pavement, the ability to channel water on a micro level and an additional way to dissipate heat. Siping can give tires such as this Goodyear DuraTrac better on-road performance without losing any off-road performance that larger tire lugs and tread-block spacing provides.
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