Off-road tires are a category of vehicle tires that use deep tread to provide more traction on unpaved surfaces such as loose dirt, mud, sand, or gravel. Compared to ice or snow tires, they lack studs but contain deeper and wider grooves meant to help the tread sink into mud or gravel surfaces.
Off-road tires are typically radials[2] with thick, deep tread. On dirt surfaces, the exposed edges of the tread dig into soft ground to give more traction than rolling friction alone, analogous to the traction provided by cleated shoes. These off-road tires provide their maximum grip on loose surfaces, but on paved surfaces the smaller contact patch affords less traction as compared to street tires. Tires with less aggressive knobs (smaller knobs and the shape of the tread cross-section closer to that of street tires) can provide a compromise, giving less grip off-road, but a grip closer to that of street tires on paved surfaces. Such tires are useful for enduro and dual-sport motorcycles and other vehicles designed to be used both off-road and on pavement.
Some off-road tires are designed to be used with low inflation pressure on difficult terrain, reducing their rigidity and allowing the tread to better conform to the terrain.[3] Such a design may allow for use on a wider range of surfaces, but tubeless tires running under rated pressure run the risk of breaking their bead. A beadlock can be used to prevent this.
All-terrain tires are known for their ability to handle different terrains. They come with grooves and channels that distribute the load evenly, improving the traction. This makes all-terrain tires ideal for off-road driving, snow and ice, sand, and other soft surfaces. They are also known for their long lasting performance.
Some of the key features of all-terrain tires(ATTs).[7]
- Largest Tread Depth
- Aggressive Multi-Pitch Pattern
- Cushioning Layer
- Large Void Area
- Tread Design
- Snow & Ice Traction
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