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Wheel alignment, which is sometimes referred to as breaking or tracking, is part of standard automobile maintenance that consists of adjusting the angles of wheels to the car manufacturer specifications. [1] The purpose of these adjustments is to reduce tire wear and to ensure that vehicle travel is straight and true (without "pulling" to one ...
Tires with large unbalances are downgraded or rejected. When tires are fitted to wheels at the point of sale, they are measured again on a balancing machine, and correction weights are applied to counteract their combined unbalance. Tires may be rebalanced if driver perceives excessive vibration. Tire balancing is distinct from wheel alignment.
In 1959, the Automotive tyre factory was founded. In 2007, the French company Michelin became a major shareholder of the company. [2] In February 2008, Michelin bought the remaining shares of Tigar Tyres for $47 million. With this acquisition, Michelin would become 100 percent owner of the company by 2010. [3]
Front-wheel drive vehicles have not only the engine but also the transaxle in front, adding to the weight difference. Moreover, additional stress is placed disproportionately on the front tires by braking and steering. Thus, tire rotation needs to occur more frequently for front-wheel drive vehicles. Turning the vehicle will cause uneven tire wear.
The word tire is a short form of attire, from the idea that a wheel with a tire is a dressed wheel. [3] [4] Tyre is the oldest spelling, [5] and both tyre and tire were used during the 15th and 16th centuries. During the 17th and 18th centuries, tire became more common in print.
Motorcycle tire changers mainly provide a simple bead loosening system and rim clamps powered manually. Certain motorcycle tire changers can accommodate wheel diameters as small as 10 inches (250 mm) and wheels at least 1 + 1 ⁄ 2 inches (38 mm) wide. [4] In addition, small atv wheels and tires are used on motorcycle tire changers.
Caster displacement moves the steering axis ahead of the axis of wheel rotation, as with the front wheels of a shopping cart. Caster angle moves the steering axis from vertical. [3] In automobile racing, the caster angle may be adjusted to optimize handling characteristics for a particular venue. This is all connected to the front wheels.
The magnitude of this torque can be calculated as the product of the lateral force generated at the contact patch and the distance behind the wheel centre at which that force acts. This distance is known as the pneumatic trail.