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2. Bar grip - Wikipedia

   en.wikipedia.org/wiki/Bar_grip

   Willys M38 Jeep with bar grip tyres. 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.

3. Tire rotation - Wikipedia

   en.wikipedia.org/wiki/Tire_rotation

   [citation needed] If the tires are unidirectional, the rotation can only be rotated front to back on the same side of the vehicle to preserve the rotational direction of the tires, unless they are remounted. More complex rotation patterns are required if the vehicle has a full-size spare tire that is part of the rotation, or if there are snow ...

4. Tire code - Wikipedia

   en.wikipedia.org/wiki/Tire_code

   Arrows: Some tread designs are "directional", and designed to perform better when driven in a specific direction. Such tires will have an arrow showing which way the tire should rotate when the vehicle is moving forwards. B: Bias belted; tires for motorcycles (Example: 150/70 B 17 69 H) – diagonal construction with belt added under the tread

5. Skid (automobile) - Wikipedia

   en.wikipedia.org/wiki/Skid_(automobile)

   This is the simplest type of skid, where directional changes are not relevant, and the vehicle merely locks up the tires moving forwards in a straight line. If all four tires start to skid approximately evenly, then a vehicle will not start rotating due to the skid, and can come to a stop with locked up tires at a somewhat longer distance than ...

6. Omni wheel - Wikipedia

   en.wikipedia.org/wiki/Omni_wheel

   The wheel was first patented in 1919 by J. Grabowiecki. US patent 1305535, J. Grabowiecki, "Vehicle wheel", issued 1919-06-03 . A variant of the wheel was patented by Josef F. Blumrich in 1972.

7. Caster angle - Wikipedia

   en.wikipedia.org/wiki/Caster_angle

   This makes a vehicle easier to control and improves its directional stability (reducing its tendency to wander). Excessive caster angle will make the steering heavier and less responsive, although in racing large caster angles are used for improving camber gain in cornering. Caster angles over 7 degrees with radial tires are common.