Correct tyre pressures

Mac · Post by **Mac** » Sun Mar 18, 2007 5:24 pm

Looking for a definitive answer to correct tyre pressures for Road driving for My Mickey Thompson 31x11.5 tyres ,getting conflicting advice between 33psi and 38psi. Help

Chuck · Post by **Chuck** » Sun Mar 18, 2007 6:08 pm

malpatt wrote:Looking for a definitive answer to correct tyre pressures for Road driving for My Mickey Thompson 31x11.5 tyres ,getting conflicting advice between 33psi and 38psi. Help

Hi, i think there will be no definitive answer for that question. You can drive a tire in a certain pressure range. Some experts in germany for example recommend to go for a slightly higher pressure ( 0.2 Bar ) than the manufacturer says because of better fuel economy. In hot summer i believe is better not to pump up your tire too much, because the air expands more during day time and the tire can not squezze than so much.

In principle the tire manufacturers give a good mixture between fuel economy, durability, comfort, safety during driving and so on.

For your special case i would not put them to hard, but also not to weak. Maybe 35 PSI is the solution. Just try it out to see what pressure is the best for comfort and drivability.

abdalla · Post by **abdalla** » Sun Mar 18, 2007 6:14 pm

Hemm well in my case 31"*10.5 Pirelli A/T i go for 40 psi in the winter and 35 psi in the summer for the reasons chuck explained ...

to tell the truth i've been doing this to all the cars we have ...

iguana · Post by **iguana** » Sun Mar 18, 2007 6:54 pm

For Mickey Thompson I was told by the experts to go max 32 psi .. I normally put 30 Psi on mine onroad and 10 psi offroad

Mac · Post by **Mac** » Sun Mar 18, 2007 7:05 pm

Thanks all, Hey Chuck how did you add pics to your signature?

MegaMoe · Post by **MegaMoe** » Sun Mar 18, 2007 7:24 pm

usually it goes like this:

31, 32 and 33 always 33. summer and winter, its a light car. 40 is way too much specially for a/t and mt, you simply can check www.tirerack.com and check ur tyres there are always max, min and avarage pressures.

adiga · Post by **adiga** » Sun Mar 18, 2007 7:25 pm

malpatt wrote:Thanks all, Hey Chuck how did you add pics to your signature?

Hay mall, you can't learn everything at once

take it easy

Mac · Post by **Mac** » Sun Mar 18, 2007 7:49 pm

Adiga, Knowledge is wealth, I,m going boat fishing on Wednesday any tips??? :monkeydance:

Mpenzi · Post by **Mpenzi** » Sun Mar 18, 2007 7:52 pm

One thing at time mate

Mac · Post by **Mac** » Sun Mar 18, 2007 7:56 pm

just wait until July when my wife goes home for 2 months then I,ll be bored and sicken you all with questions :party:

khaiwi · Post by **khaiwi** » Sun Mar 18, 2007 8:02 pm

As mega said check the site for detailed technical advice. Many factors play a major role to find the ultimate tire pressure for a certain scenario, here is one way to identify the pressure:

1- load ur truck with weights as it will be most of the time (including fuel)
2- Use a chalk and cover part of the tire (thread side) with chalk powder
3- drive on a clean ground few meters and check how the traces of chalk are fading
3a- Fading traces of chalk from the outer side of the tire means low pressure......increase the pressure by 2psi and repeat the test
3b- Fading traces of chalk from the center of the tire means high pressure......decrease the pressure by 2psi and repeat the test
3c- Fading traces of chalk is even from the sides and center of tire means you're done and this is the proper tire pressure for your setup.

Hope it's clear.

Cheers,

abdalla · Post by **abdalla** » Sun Mar 18, 2007 10:05 pm

Thanks megamoe and khaiwi ...

Mac · Post by **Mac** » Mon Mar 19, 2007 4:02 pm

Thanks everyone. :hawaiidance:

Correct tyre pressures

Correct tyre pressures

Re: Correct tyre pressures