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2. Bar grip - Wikipedia

   en.wikipedia.org/wiki/Bar_grip

   Bar grip tyres, or 'NDT' (Non-Directional Tire) in US military parlance, are an early tyre tread pattern developed for off-road use. Bar grips are characterised by a solid rubber circumferential centre strip, with large solid cleat alternately to either side. These span the full width of the tread.

3. Airless tire - Wikipedia

   en.wikipedia.org/wiki/Airless_tire

   The drawbacks to airless tires depend on the use. Heavy equipment operators who use machinery with solid tires may become fatigued. Any airless tire will be heavier than the rubber tire it is meant to replace. However, airless tires are not popular with hardcore off-roaders, as those vehicles often need to travel long distances at highway speeds.

4. Tire - Wikipedia

   en.wikipedia.org/wiki/Tire

   Early rubber tires were solid (not pneumatic). Pneumatic tires are used on many vehicles, including cars, bicycles, motorcycles, buses, trucks, heavy equipment, and aircraft. Metal tires are used on locomotives and railcars, and solid rubber (or other polymers) tires are also used in various non-automotive applications, such as casters, carts ...

5. Off-road tire - Wikipedia

   en.wikipedia.org/wiki/Off-road_tire

   Off-road cycle tires, colloquially called knobbies, [4] may be found on motocross and enduro motorcycles, ATVs, and mountain bikes. [1] Tires for single-track vehicles and ATVs have a curved profile such that some tread only contacts the ground during turning. Depending on the model of tire, an off-road capable tire may or may not be approved ...

6. Rolling resistance - Wikipedia

   en.wikipedia.org/wiki/Rolling_resistance

   The losses due to hysteresis also depend strongly on the material properties of the wheel or tire and the surface. For example, a rubber tire will have higher rolling resistance on a paved road than a steel railroad wheel on a steel rail. Also, sand on the ground will give more rolling resistance than concrete. Soil rolling resistance factor is ...

7. All-terrain vehicle - Wikipedia

   en.wikipedia.org/wiki/All-terrain_vehicle

   An all-terrain vehicle (ATV), also known as a light utility vehicle (LUV), [1] a quad bike or quad (if it has four wheels), as defined by the American National Standards Institute (ANSI), is a vehicle that travels on low-pressure tires, has a seat that is straddled by the operator, and has handlebars, similar to a motorcycle. As the name ...