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  2. Tire uniformity - Wikipedia

    en.wikipedia.org/wiki/Tire_uniformity

    Ply steer describes the lateral force a tire generates due to asymmetries in its carcass as is rolls forward with zero slip angle and may be called pseudo side slip. [4] It is the characteristic that is usually described as the tire's tendency to “crab walk”, or move sideways while maintaining a straight-line orientation. This tendency ...

  3. Scrub radius - Wikipedia

    en.wikipedia.org/wiki/Scrub_radius

    The line through the steering axis creates a pivot point around which the tire turns. If these lines intersect at the road surface, a zero scrub radius would be present. When the intersection is below the surface of the road, this is positive scrub radius. Conversely, when the lines intersect above the road, negative scrub radius is present.

  4. Ackermann steering geometry - Wikipedia

    en.wikipedia.org/wiki/Ackermann_steering_geometry

    Simple approximation for designing Ackermann geometry. A simple approximation to perfect Ackermann steering geometry may be generated by moving the steering pivot points [clarification needed] inward so as to lie on a line drawn between the steering kingpins, which is the pivot point, and the centre of the rear axle. [3]

  5. Camber angle - Wikipedia

    en.wikipedia.org/wiki/Camber_angle

    However, any camber affects the contact patch of the tire while driving in a straight line. Zero camber gives the best traction as it maximises the contact patch between the road and the tires and puts the tire tread flat on the road. Therefore excessive camber impairs straight driving in rain and snow and when accelerating hard.

  6. Tire load sensitivity - Wikipedia

    en.wikipedia.org/wiki/Tire_load_sensitivity

    In practice, the maximum horizontal force Fy that can be generated is proportional, roughly, to the vertical load Fz raised to the power of somewhere between 0.7 and 0.9, typically. Production car tires typically develop this maximum lateral force, or cornering force , at a slip angle of 6-10 degrees, although this angle increases as the ...

  7. Slip angle - Wikipedia

    en.wikipedia.org/wiki/Slip_angle

    The ratios between the slip angles of the front and rear axles (a function of the slip angles of the front and rear tires respectively) will determine the vehicle's behavior in a given turn. If the ratio of front to rear slip angles is greater than 1:1, the vehicle will tend to understeer, while a ratio of less than 1:1 will produce oversteer. [2]

  8. Radial tire - Wikipedia

    en.wikipedia.org/wiki/Radial_tire

    The low crown angle gave rigidity to support the tread and the high sidewall angle gave comfort. To increase strength, the manufacturer would increase the number of plies, and the heat buildup in the tire. [20] By comparison, radial tires lay all of the cord plies at 90 degrees to the direction of travel (that is, across the tire from lip to lip).

  9. Caster angle - Wikipedia

    en.wikipedia.org/wiki/Caster_angle

    Front suspension of a race car ‍ — the caster angle is formed by the line between upper and lower ball joint An example of a chopper with a raked fork at an extreme caster angle The caster angle [ 1 ] or castor angle [ 2 ] is the angular displacement of the steering axis from the vertical axis of a steered wheel in a car , motorcycle ...

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