Tread patterns are often related to one of two things: tires or caterpillar tracks. This post will focus on those patterns associated with tires. The most common tire pattern associated with off road tires is the mud tire pattern although off road tires also have an all terrain tread pattern. Tire tread patterns are better known as tire tread designs.These dseigns are arrangements of a mesh of all sorts: independent tread blocks, circumferential and lateral grooves, continuous ribs, as well as the thin sipes molded into the tread to fine-tune noise, handling, traction and wear. Tire tread patterns have different but basic designs that each allow them to handle various road conditions.
Symmetric Tread Patterns
symmetric tread patters are the most common type of designs and they feature continuous ribs or independent tread blocks across the entire tread face where both inboard and outboard halves feature the same pattern. Tires featuring symmetric tread patterns allow using multiple tire rotation patterns. Furthermore tires with symmetrical tread patterns typically emit a higher level of noise compared to other treaed patterns.
Asymmetric Tread Patterns
An asymmetric pattern is designed to blend the requirements of dry grip and water dispersal/snow traction where the tread pattern changes across the face of the tire. An asymmetric tread pattern usually incorporates larger tread ribs/blocks on the outboard side to increase cornering stability on dry roads by offering greater contact area. This also helps to reduce tread squirm and heat buildup on the outside shoulder. The inboard side usually features smaller independent tread blocks to aid wet and/or winter traction when driving straight ahead. Tires featuring asymmetric tread patterns allow using multiple tire rotation patterns.
Directional Tread Patterns
A directional or unidirectional tread pattern is designed to roll in only one direction. It incorporates lateral grooves on both sides of the tire’s centerline that point in the same direction and result in v-shaped tread blocks. These grooves enhance hydroplaning resistance at high speeds by pumping water more efficiently through the tread pattern. Directional tires are intended to be rotated from the front axle to the rear axle.
Asymmetric and Directional Tread Patterns
Asymmetric and directional tread patterns have v-shaped tread grooves that are offset compared to the centerline of the tire. Tires featuring asymmetric and directional tread patterns must be treated as directional tires for tire rotation. However, if different tire sizes are used on the front vs. rear axle, they become location-specific and prohibit any tire rotation possibilities.
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