Meaning of Tyre lettering




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  1. #1
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    Default Meaning of Tyre lettering

    I have the following lettering on my tyres :

    M + S =
    265 x 65 x R17 = tyre sze
    112H

    Can somebody please explain .

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  2. #2
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    Default Re: Meaning of Tyre lettering

    On Michelin, M + S = Mud and Snow

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  3. #3
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    Default Re: Meaning of Tyre lettering

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    Default Re: Meaning of Tyre lettering

    yes: M + S = Mud and Snow.

    NOT "mud and sand"
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    Default Re: Meaning of Tyre lettering

    Never too old to learn !!

    I also thought is was Mud and Sand.

    (What is snow? - as rare as rain)
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    Default Re: Meaning of Tyre lettering

    Just keep in mind, that a M+S rating doesn't mean the tyre is suitable for cold weather operation. It is just a classification of the tread, not the compound. Winter tyres, as they are required in several countries in Europe for the winter season, have an additional snowflake symbol, indicating the tyre compound is a cold weather compound.
    Last edited by HugoNotte; 2018/12/01 at 01:16 PM.
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  8. #7
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    Default Re: Meaning of Tyre lettering

    Quote Originally Posted by HugoNotte View Post
    Just keep in mind, that a M+S rating doesn't mean the tyre is suitable for cold weather operation. It is just a classification of the tread, not the compound. Winter tyres, as they are required in several countries in Europe for the winter season, have an additional snowflake symbol, indicating the tyre compound is a cold weather compound.
    Interesting, i wonder what would be added to a cold weather compound, compared to say a tyre that would tecnically require a sun symbol
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    Default Re: Meaning of Tyre lettering

    Quote Originally Posted by julius caesar View Post
    Interesting, i wonder what would be added to a cold weather compound, compared to say a tyre that would tecnically require a sun symbol
    I haven't used winter tyres in 20 years now. But back then they where made of a softer compound in order to ensure adequate grip at cold temperatures when the grip of normal tyres would start to deteriorate. If you kept winter tyres on for longer than necessary, they would wear faster at warmer temperatures than the summer tyres.
    Not sure whether it is today still like this, seeing that modern tyres can have softer compounds AND have give better mileage.

    Back then winter tyres often had a reduced speed rating, as they weren't made to withstand high temperatures and one had to have a sticker on the dash board indicating that reduced max. speed.
    Last edited by HugoNotte; 2018/12/16 at 04:27 PM.
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  11. #9
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    Default Re: Meaning of Tyre lettering

    Quote Originally Posted by HugoNotte View Post
    I haven't used winter tyres in 20 years now. But back then they where made of a softer compound in order to ensure adequate grip at cold temperatures when the grip of normal tyres would start to deteriorate. If you kept winter tyres on for longer than necessary, they would wear faster at warmer temperatures than the summer tyres.
    Not sure whether it is today still like this, seeing that modern tyres can have softer compounds AND have give better mileage.

    Back then winter tyres often had a reduced speed rating, as they weren't made to withstand high temperatures and one had to have a sticker on the dash board indicating that reduced max. speed.
    I see now my Grabber AT3 is marked m+s with a snowflake as well
    Are they for cold weather (only)?

    Did Nam last Dec with trailer, including a very hot trip almost nonstop from Swakop to beyond Sossus, towing an off road trailer, no problems whatsoever, even though i deflated tyres for corrugations
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    Default Re: Meaning of Tyre lettering

    Quote Originally Posted by julius caesar View Post
    I see now my Grabber AT3 is marked m+s with a snowflake as well
    Are they for cold weather (only)?

    Did Nam last Dec with trailer, including a very hot trip almost nonstop from Swakop to beyond Sossus, towing an off road trailer, no problems whatsoever, even though i deflated tyres for corrugations
    The mountain with snow flake symbol indicates that the tyre meets certain winter / cold weather traction requirements. Traditionally a tyre's rubber would get harder with lower temperatures which would result in less traction on ice, snow or even dry roads. Up until some 10 or 20 years ago, a different, cold weather rubber compound would be used in order to compensate for lower temperatures.
    But these days, tyre compounds can, similar to synthetic oils, stretch over a much wider range of temperatures.

    Take for example the very old GY Wrangler from 15+ ago or even the old BFG A/T. They were classic examples of tyres with a hard rubber compound. They gave loads of mileage but at the expense of comfort and traction specially on wet roads.
    More modern tyres, the FS Destination A/T being one of the first I know of, had synthetically engineered rubber compounds, with exceptionally long molecule chains, which gives an otherwise relatively soft tyre a decent life span and damage resistance together with ride comfort and good grip on tar.

    Same I would think would apply to most modern A/T tyres. The Grabber AT3 would have an advanced rubber compound which is able to do well at our normal temperatures but would still meet cold weather traction requirements in order to get the snowflake symbol. Nothing to worry about.

    In essence, the M+S symbol says more about the tread pattern while the snowflake symbol is more related to the rubber compound.

    Read more here: https://www.tires-easy.com/blog/mountainsnowflake-symbol/



    Last edited by HugoNotte; 2018/12/18 at 11:18 AM.
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  13. #11
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    Default Re: Meaning of Tyre lettering

    Quote Originally Posted by HugoNotte View Post
    The muountain with snow flake symbol indicates that the tyre meets certain winter / cold weather traction requirements. Traditionally a tyre's rubber would get harder with lower temperatures which would result in less traction on ice, snow or even dry roads. Up until some 10 or 20 years ago, a different, cold weather rubber compound would be used in order to compensate for lower temperatures.
    But these days, tyre compounds can, similar to synthetic oils, stretch over a much wider range of temperatures.

    Take for example the very old GY Wrangler from 15+ ago or even the old BFG A/T. They were classic examples of tyres with a hard rubber compound. They gave loads of mileage but at the expense of comfort and traction specially on wet roads.
    More modern tyres, the FS Destination A/T being one of the first I know of, had synthetically engineered rubber compounds, with exceptionally long molecule chains, which gives an otherwise relatively soft tyre a decent life span and damage resistance together with ride comfort and good grip on tar.

    Same I would think would apply to most modern A/T tyres. The Grabber AT3 would have an advanced rubber compound which is able to do well at our normal temperatures but would still meet cold weather traction requirements in order to get the snowflake symbol. Nothing to worry about.

    In essence, the M+S symbol says more about the tread pattern while the snowflake symbol is more related to the rubber compound.

    Read more here: https://www.tires-easy.com/blog/mountainsnowflake-symbol/


    Interesting, although i understand our tyres are a rubber compound with in fact very little rubber in, rubber is one of the few substances which, contrary to popular belief, shrinks when heated and expands when cooled. Due to long molecule chains and something called entropy. Now i am on thin ice, i know so little
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    Last edited by julius caesar; 2018/12/18 at 06:12 PM.
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