Symmetric Tread Patterns
most common. Continuous ribs or independent tread blocks across the entire tread face where both inboard and outboard halves feature the same pattern. Symmetric tread patterns allow using multiple tire rotation patterns.
Asymmetric Tread Patterns,
Designed to blend the requirements of dry grip and water dispersal/snow traction where the tread pattern changes across the face of the tire. Usually incorporates larger tread ribs/blocks on the outboard side to increase cornering stability on dry roads with 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. Asymmetric tread patterns allow using multiple tire rotation patterns.
Directional (Unidirectional) Tread Patterns
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. Unless they are dismounted and remounted on their wheels to accommodate use on the other side of the vehicle, directional tires are to be used on one side of the vehicle and are intended to be rotated from the front axle to the rear axle. If different tire sizes are used on the front vs. rear axle, the tires become location-specific and prohibit tire rotation unless remounted.作者: MYEVO 时间: 2014-9-1 22:32:07