Tire Pressure

[Gjonesmi]

What is everyone running for tire pressure on their 2015 X5 335?

[Almaretto]

I do not have an X5 335, but I run what is written on driver side door jam.

[karzrkewl]

I'm running 36 on the fronts and 41 on the rears. The owners guide had a table with different PSI's based on tire size.

[Almaretto]

Originally Posted by karzrkewl

I'm running 36 on the fronts and 41 on the rears. The owners guide had a table with different PSI's based on tire size.

See attached.

[ixlr8]

Originally Posted by Almaretto

See attached.

I was wondering about tire pressures as well. The charts they show for different tire pressures for different tires all show a fully loaded vehicle. Should it be the same if only carrying one person? Presently I am running 38 psi in all 4 tires as 99% of the time I am the only one in the vehicle.

[alphaod]

I have 38 and 44, front and rear respectively.

[Almaretto]

Originally Posted by ixlr8

I was wondering about tire pressures as well. The charts they show for different tire pressures for different tires all show a fully loaded vehicle. Should it be the same if only carrying one person? Presently I am running 38 psi in all 4 tires as 99% of the time I am the only one in the vehicle.

I am not sure, but I believe the more important detail is that they are cold readings. As temperature rises, pressure or volume must as well.

I run staggered pressured as instructed by door label.

[BitteEinBit]

It really depends on the size wheel and tire. For example, if you run 18" it's 33/41psi for speeds up to 100mph. However, regardless of wheel/tire size, I always add 2psi to the owners manual recommendation...so 35/43psi. For sustained triple digit speeds you'll want even higher pressure, not to exceed the max listed on the tire.

[alphaod]

I should point out my cold pressures are set for the colder months, so they go up as the temperatures get warmer. Sure we lose some pressure over time, but the increase due to temperature seems to offset the drops that I don't need to top it off that often unless the dealer decides to bleed my pressures down (even when I tell them not to--for this alone I would not give 5 stars for service).

[jadatis]

Tirepressure advice is all about to give the tire a deflection , wich does not give to much heatproduction for the speed it is given for,so rubber wont get to hot and hardens so damages in next bendings/deflections.

In Europe before 2000 , they gave normal advice for loads on axles , determined by the car maker for 3 persons and a little load .
this gave for frontwheeldrive cars mostly front higher pressure then rear.

After 2000, to my conclusion has all to do with the Ford/Firestone-affaire, also for European cars , normal advice is given for GAWR's , what before 2000 was used for Fully loaded advice, and mostly rear higher pressure then front.

I call myself nowadays "Pigheaded Dutch Tirepressure-specialist", and am able to calculate a pressure advice , if you can present me weights on seperate wheels , and maximum speed you wont go over for even a minute, and tire specifications like , maximum load or loadindex, speedcode , and tirekind to determine the AT-pressure .