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A tire (or tyre) is a ring-shaped covering that fits around a wheel's rim to protect it and enable better vehicle performance. Most tires, such as those for automobiles and bicycles, provide traction between the vehicle and the road while providing a flexible cushion that absorbs shock

19.54, 6.02.13. 

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Tread voids provide space for the lug to flex and deform as it enters and exits the footprint. Voids also provide channels for rainwater, mud, and snow to be channeled away from the footprint. The void ratio is the void area of the tire divided by the entire tread area. Low void areas have high contact area and therefore higher traction

The tread is a thick rubber formulated to provide an appropriate level of traction. The tread pattern is characterized by the geometrical shape of the grooves, lugs, voids and sipes

Tread patterns feature non-uniform lug sizes circumferentially to minimize noise levels at discrete frequencies

The sidewall contains air pressure and transmits the torque applied by the drive axle to the tread to create traction

axle shafts are an integral component of a wheeled vehicle. In a live-axle suspension system, the driving axles serve to transmit driving torque to the wheel, as well as to maintain the position of the wheels relative to each other and to the vehicle body. The axles in this system must also bear the weight of the vehicle plus any cargo

In some designs, this allows independent suspension of the left and right wheels

Even when the suspension is not independent, split axles permit the use of a differential

but it will not have attached axle housing tubes. It may be attached to the vehicle frame or body, or integral in a transaxle. The axle shafts (usually C.V. type) then transmit driving torque to the wheels. Like a full floating axle system, the shafts in an independent suspension system do not support any vehicle weight