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Tyre Speed Ratings
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You will find your speed rating on the side
of your tyre at the end of a series of numbers - as shown above W is the
speed symbol. For MOT requirements in this country, it is not necessary
to fit a tyre with a speed rating to match the original vehicle fitment
or the maximum speed of the vehicle. Tyres must be suitable for the
purpose for which the vehicle will be used. Insurance companies might say that a vehicle should be fitted with the tyres having the speed rating recommended by the car manufacturer: but even if you fit Z-rated tyres for speeds over 150 mph they will not insure you if you drive in excess of 70 mph in this country! The vehicle manufacturer has to
recommend a tyre with a rating to match the maximum speed of the car
because when it leaves the factory he does not know exactly where the
car is going or for what purpose it might be used. You might want to use
the car in a country where higher speed limits apply than the UK or take
it to a race track at the weekend.
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