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Thread: Whats the verdict on mixing tyre speed ratings?

  
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    Mike RB's Avatar
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    Whats the verdict on mixing tyre speed ratings?

    Hi,

    Time to change the front tyres on my Mk4 SRi 2.2 and notice that the rears are W rated. This seems a bit much and was thinking of putting V rated on the front. Is there any reason why I should not do this or should I pay the extra and get W?

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    As long as you have H or above, you'll be fine. Most Astras came with H rated tyres as standard.
    2007 Metro Blue 5 door Mk5 Elite 1.7CDTI
    6th Vauxhall (4th Astra) in 10 years...plus a couple of other sheds...

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    M 81 mph 130 km/h
    N 87 mph 140km/h Temporary Spare Tires
    P 93 mph 150 km/h
    Q 99 mph 160 km/h Studless & Studdable Winter Tires
    R 106 mph 170 km/h H.D. Light Truck Tires
    S 112 mph 180 km/h Family Sedans & Vans
    T 118 mph 190 km/h Family Sedans & Vans
    U 124 mph 200 km/h
    H 130 mph 210 km/h Sport Sedans & Coupes
    V 149 mph 240 km/h Sport Sedans, Coupes & Sports Cars
    W 168 mph 270 km/h Exotic Sports Cars
    Y 186 mph 300 km/h Exotic Sports Cars

    H is an outcast from this info???? its not anything above H, it depends what speed you plan to do or something, and H is the exception..

    http://www.tirerack.com/tires/tirete....jsp?techid=35
    CAR: 2007 Vaxhall Astra TwinTop 1.8 Design
    WWW.DG83.COM


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    Pete2Astras's Avatar
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    No problem with mixing speed ratings as fas as I am aware, as long as the lowest speed rating is the minimum for your car of course!

    What you might find though is that the tread patterns, wear rates etc are slightly different as well.

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    Speed Rating
    It is IMPORTANT that you check your speed rating before buying your tyres - as choosing a lower tyre speed rating could INVALIDATE your INSURANCE. For further information call 0845 200 0022.
    Taken from here....
    http://www.blackcircles.com/general/speedrating
    Now drives : 2002 Astra SRi Turbo in Black
    PREVIOUS ASTRA'S : 1990 GTE 2.0 8v | 1993 1.4 GLS | 1994 1.6 Cesaro | 1995 1.8 16v Sport

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    And I found this....

    TYRE SPEED RATINGS

    The other important part of a tyre size is the load and speed rating. These take the form of two numbers and a letter i.e. 84T. The 84 is the load carrying capacity of the tyre, in this case 500 kg per tyre. This indicates that the overall weight of the car must not exceed 2000kg (500kg x 4 tyres). The T is the tyres maximum sustained speed code(see table).

    Whilst it is not against the law to change the original specification, the speed rating of a tyre is usually used in relation to the performance of the car, therefore the original rating should be fitted in accordance with the car manufacturer's recommendation. Failure to do so could void any warranty or insurance claim.
    http://www.bestautocentres.co.uk/tyre_speed.htm
    Now drives : 2002 Astra SRi Turbo in Black
    PREVIOUS ASTRA'S : 1990 GTE 2.0 8v | 1993 1.4 GLS | 1994 1.6 Cesaro | 1995 1.8 16v Sport

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