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  1. #21
    Join Date
    Apr 2018
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    Default Re: Tyres and Speed rating

    Quote Originally Posted by Swannie1960 View Post
    This discussion has now got my mind going: if a tyre is rated for a certain speed, how is that rating affected by load. For example, will a tyre rated for 180km/h on an unloaded Hilux will become unsafe at a lower speed if there is a 500 kg load at the back?

    Also, what is the safe loading limit of an AT tyre? Is that specified in any way?
    After your tyre size is another set of numbers. This is your load rating per tyre.

    I imagine the speed rating is at the tyre's maximum load rating. The link below explains all the markings and indexes them for you.

    https://www.errolstyres.co.za/conten...-speed-indexes


    P.S example: 265/75 R16 119/116R LT
    265/75 R16 is the size
    119 is the load rating (refer to index for actual kg)
    R is the speed rating
    LT means it is a "light truck" spec tyre.
    Last edited by Sheldon93; 2021/09/16 at 03:08 PM. Reason: Added example
    2018 Suzuki Jimny - Expedition vehicle
    2002 Land Rover Defender - Daily Drive

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  3. #22
    Join Date
    Feb 2011
    Location
    Kuilsrivier
    Age
    50
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    2,070
    Thanked: 195

    Default Re: Tyres and Speed rating

    Look at the Pirelli Scorpion AT.
    Yes, they more of a 90% onroad and 10% offroad.
    Great in the wet, last long and does not make a lot of roadnoise.
    Expect around 80k km.


    2007 Nissan Navara 4L Auto - Worshond


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  5. #23
    Join Date
    Sep 2021
    Location
    KZN South Coast
    Posts
    25
    Thanked: 10

    Default Re: Tyres and Speed rating

    Quote Originally Posted by Sheldon93 View Post
    After your tyre size is another set of numbers. This is your load rating per tyre.

    I imagine the speed rating is at the tyre's maximum load rating. The link below explains all the markings and indexes them for you.

    https://www.errolstyres.co.za/conten...-speed-indexes


    P.S example: 265/75 R16 119/116R LT
    265/75 R16 is the size
    119 is the load rating (refer to index for actual kg)
    R is the speed rating
    LT means it is a "light truck" spec tyre.
    The maximum load rating is the max weight a tyre can carry at a particular speed. For example 119=1360kg the tyre can carry at a speed of 170km/h but also take you vehicle weight distribution as well as the load into consideration. We should also realize that G force and tyre pressure will then determine further safety of that tyre. High load rating with a lower speed rating could definitely be effected when loaded

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  7. #24
    Join Date
    Jul 2020
    Location
    Roodepoort
    Age
    61
    Posts
    179
    Thanked: 313

    Default Re: Tyres and Speed rating

    Confession time: I never knew that there was a load rating indication on tyres. THANKS, GENTS.
    Johan Swanepoel

    "Nkabe ke ngwana wa morago"

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