Automobile Engineering in ME
The aspect ratio (expressed in percentage) of the tyre is defined as the ratio of

Wheel diameter to section width
Wheel diameter to section height
Section width to section height
Section height to section width

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Automobile Engineering in ME
The rigid suspension is beneficial when

Large changes in load make it necessary to have a large suspension stroke
It is desired to improve tyre to ground contact characteristics
It is desired to reduce the unsprung mass
It is desired to have more flexibility in design

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Automobile Engineering in ME
The basic function of the suspension is to

Ensure that wheel alignment is not disturbed during driving
Absorbs vibration and impact forces from the road surface
Automatically correct the effects of over steering
Ensure that the steering wheel can deliver a suitable amount of steering force

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