Tyre temps?

[Shane]

So while driving this weekend I discovered a function on my tps monitoring system.

Tyre temperatures.

So mine were running between 42 degrees and 50 degrees.

What would be ideal?

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[KurtG]

I think 41 is ideal

[LesseW]

Shane dis n interessante onderwerp en ek sal graag die mense se opinies wil hoor.

Ek het destyds raad by iemand gekry dat jou band temperatuur nie hoër as 30 grade moet gaan i.v.m die temperatuur wanneer die voertuig aangeskakel word nie.

My Ou Prado se bande het al op 65c gedraai maar daar was baie faktore wat tot die temp kon bydrae.


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[Shane]

Dis juis die rede vir my vraag.

Mens laai nie altyd dieselfde gewig nie - dws die gewig is nooit staties nie - so dis moeilik om altyd te bepaal hoe hard jou bande gepomp moet word.

Ek glo temperatuur kan as 'n maklike maatstaaf gebruik word?

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[Mad Manny]

If you apply a rule of max. 30°C you will only drive in winter for short distances.

I did a trip to the Cape with a TPMS in use.
The tyre Temps were more interesting than the Pressures.

Tyres ran at up to 54°C. The hotter the tyres the higher the Pressure climbed.

On one stretch the one tyre climbed into the 60's so we stopped for lunch and I parked in the shade.
When he headed out the tyres were at around 27°C, although they heated up, as it was cooling down in the afternoon they stayed below 54°C...

I think the reason why that tyre got hotter is that the sun was on that side... not sure...

[Jorrie]

You will be fine at 65 degrees C. Start wondering at higher temps than 65 degrees C. When you hit higher temps eg 85 to 90 degree C then it will be better to stop and cool down the tyres. On a hot day it is not uncommon to see 60 degrees. Personnally I prefer to stop at 65 degrees C. It is a balancing act involving a number of factors, eg road temperature, load, tyre pressures, speed, tyre type, etc. Google the subject and you will see that you should stop at 90 degrees C. Once the temperature goes higher the tyres are at risk of losing their structural strength.Some tyres will turn blueish in colour if they have been overheated. Then you should replace the tyres.

[BushWacker]

I dont have a TPS system but when I stop I generally
feel the tyre temps round the car ... doubt Ive ever thought >60deg ... to the touch ... which is temp of hot bathwater.
I esp note if one tyre is hotter than the rest. I generally inflate to 2.5 Bar, before travelling .
Travelling with tyres deflated results in a lot of sidewall working and significantly increases the temp ... very noticeable on river-trips. I think, esp with BFGs etc, it can contribute to layer searation and deterioration of sidewall competence.
Im sure tyre manufactures know the PV/T laws etc and
design respectfully...

[Mad Manny]

Chas, at the speeds you can do its unlikely your tyres could get warmer than standing Temp...

[BushWacker]

Chas, at the speeds you can do its unlikely your tyres could get warmer than standing Temp...

I question whether speed is the most influential ,
in respect of the running temperature, unless one
Moose Weaves about/along the highway in a Fortuner etc
trying to mimic the F1 guys at warm-up ;
... but maybe I'll test my slicks out at Kyalami ...

[Jorrie]

Conditions in certain parts of the country are harsh in summer and 65 degrees C can come up fairly quickly on a hot tar road.

[Ricof4e]

You guys probably missed a few physics classes in High School.

Google Boyle's law...

[BushWacker]

You guys probably missed a few physics classes in High School.

Google Boyle's law...

... had ugly female lecherer,
and when she said:
" Consider a particle ... "
all the goofballs got too confused & tormented etc
Was difficult to maintain order and continuity ...

[Mad Manny]

Boyle lived before the invention of the pneumatic tyre, however his law that states that the temperature of the air in the tyre will increase with increased pressure is totally irrelevant to this discussion.
What is relevant is that the tyre pressure will increase as the tyre heats up. But we know this and I mentioned it in my post...
Stick to Legal Law Chicory...

[BushWacker]

Boyle lived before the invention of the pneumatic tyre, however his law that states that the temperature of the air in the tyre will increase with increased pressure is totally irrelevant to this discussion.
What is relevant is that the tyre pressure will increase as the tyre heats up. But we know this and I mentioned it in my post...
Stick to Legal Law Chicory...

... actually pv=k as he held temp const
so 'dismissed with costs ...'

but , probly better to use Universal Gas Law
(p1V1)/T1=(p2V2)/T2
... as I intimated in #7 ...
but even then , a lot more factors at play
as Jorrie in #6 pointed out.

What we may rather consider are what are the
most influential factors...
Those practice round F1 guys weave their
vehicles and not even at high speed
to warm the tyres
so I believe Tyre-ground friction
and tyre , esp sidewall, 'working' & stressing
cause the most heat.

... so you guys always assumed my 130
weaving was to try and release the diff-lock
...but I might as well be warming my slicks
for some challenging ascent ...

[Ricof4e]

Boyle lived before the invention of the pneumatic tyre, however his law that states that the temperature of the air in the tyre will increase with increased pressure is totally irrelevant to this discussion.
What is relevant is that the tyre pressure will increase as the tyre heats up. But we know this and I mentioned it in my post...
Stick to Legal Law Chicory...

You may not see this, but I am swinging my gavel at you with murderous intent.

Consider Boyle's law again.