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Thread: What's "normal" Tyre pressure differences when cold and hot?

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    Question What's "normal" Tyre pressure differences when cold and hot?


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    Installed tire pressure monitor.









    The pressure shown is the pressure when cold 36psi/42psi which is recomended one for MT09. After short ride yesterday I've noticed the pressure rises to 39 psi front and 49 psi rear tyre. Is that "normal"?

    I mean I know there is a rule of thumb for cars you always measure tyre pressure when cold.

    The question here is what is acceptable rise of pressure after a ride?

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    Default Re: What's "normal" Tyre pressure differences when cold and hot?

    Does seem a lot. May be interesting to get them filled with nitrogen, see if it makes a difference?

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    Default Re: What's "normal" Tyre pressure differences when cold and hot?

    We run rear racetecs at 24 hot, which is about 18 cold

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    Default Re: What's "normal" Tyre pressure differences when cold and hot?

    You’ve got special blow-lamp tyres that overheat the air.

    Or it’s normal.

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    Default Re: What's "normal" Tyre pressure differences when cold and hot?

    It's normal.
    All tyres will warm up and raise the psi. Some more than others. Look and see if there is a recommended working temperature for your tyre. Our race tyre is around the 80 mark , the closest we got to that this year was high 50's in the heatwave.

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    Default Re: What's "normal" Tyre pressure differences when cold and hot?

    It's the law.

    Subo.jpg

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    Default Re: What's "normal" Tyre pressure differences when cold and hot?

    Depends on how you ride. Spirited riding will heat the tyres more. For road riding I generally consider 5-6 to be normal (a bit more on the back because it's constantly doing work). Leaving the bike stood in sunlight will make quite a big difference too.

    The thing with TPMS isn't to get worried about how much the pressure rises, it's to alert you if it drops when it shouldn't.

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    Default Re: What's "normal" Tyre pressure differences when cold and hot?

    Quote Originally Posted by a_morti View Post
    Does seem a lot. May be interesting to get them filled with nitrogen, see if it makes a difference?
    They're already 79% nitrogen filled.
    Run my corsa 2s a bit harder on the road than on the track as has been said they work harder on track.
    Providing they don't drop below 25 you'll be fine.
    Sometimes you can have too much information y'know

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