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Q: Why are smooth tyres with no tread ilegall?
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Why are cars and trucks treaded?

Assuming you're talking about the tyres... The tread on the tyres channels water away from the wheels - allowing the tyres to grip the road better than if the tyres were completely smooth.


Why is the braking distance longer when the tires are worn out?

Smooth tyres have less frictional grip on the road surface, and will slide further that a deep tread tyre.


Why vehicle tires are tread ed?

Its so tyres have grip in the wet


What is the thread depth on a racing car tire?

The normal racing tyres are slick and have no tread. The intermediate tyre has a 2.5mm tread, and the full wet has a 5mm tread.


Why were slick tires introduced in formula one?

Slick tyres are tyres without tread. The tread is only there so that water can be pushed into it on a wet track. On a dry track no tread is needed and therefore you will get more contact with the road without it, allowing the cars to accelerate/brake/corner faster. Therefore slick tyres are used as they are faster in dry conditions.


The rough tread on the tires increases friction between the tire and the ground?

It does not! In fact will DEcrease contact and therefore friction. A bald or smooth tyre will be best on dry surface. The purpose of tread on tyres is to sipe away water on wet road and a rough tread would act in similar manner though far less efficiently.


What checks would you before on the tyres when undertaking a service?

It is important to closely inspect the condition of the tyres. Looking for damage and splits, and to ensure the depth of the tyres' tread are legal or even better.


Are bald tyres non tread tyres?

Bald tyres are tyres where the tread has been worn of in use and if this is the case then the tyres are not same (and illegal) to use. There are tyres made without a tread (for racing cars), these are not called bald tyres, they are called "slicks" and instead of a tread the surface of the tyre is made to be sticky in use.


How does tread on tires affect your driving when the tread is worn away and the tires become bald?

the tyres could blow and you may lose controle of your car


Are tire bubbles always caused by pot holes?

No re-tread tyres can also bubble


Why are rough tyres safer than smooth tyres?

rough tires get more traction thus, like sliding.


What causes tires hi low spots on the tread?

Poorly inflated tyres and unbalanced wheels and tracking.