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Tire Pressure

11499 Views 9 Replies 6 Participants Last post by  MEnthusiast
Yes, I know its been covered by others- yet there seems to be no definitive answer to the question: what are the recommended pressures? (Im asking for the USA, but Im sure others are curious also)

I have dunlap 8080s and the sidewall says max pressure is 51psi. The sticker on the drivers side of the door has icons that apply to the dunlap tires but then says max=44/48. The sticker then lists another set of numbers but these have French next to them for a description. It seems to me that these are for snow tires.

I checked the M5 manual and it states recommended pressures should be 35/38. I called my dealer and was told to use 32/39. I then called BMW USA and they said to use whatever the door sticker says. I decided to call the dealer one last time and they then said to use the 44/48 number.

I tried this and it seems too high to me. The car is a little too "bouncy". I decided to compromise between the manual and the door sticker and set the pressures to 40/43.5 psi.

Does anyone know what the actual recommended pressures are?

thanks in advance.

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Try the higher pressures(44/48) at first then watch the tires. If they wear in the middle of the tread reduce the air pressure for a while till they even out then add back air to less that the original pressure(40/44).

I tend to use higher pressures with high speeds and faster cornering manuvers. Keeps the rubber on the rim.

Had to go to Orlando a few years ago in a 535is, a distance of 160 miles and new I would be running at 80 to 90mph. The night
before a added seven pounds of additional air to each tire.

Sure enough at about 80mph I hit a giant turtle about six inches thick. I kept going another 1/2 mile to survey the damage under a
bridge overpass. A trooper was giving a ticket to a driver and I called to him to ask if he saw the turtle on the road and he suprised me by admitting he saw the turtle. So much for highway safety!

My factory wheel was bent about a 1/2 inch and the tire was secure and not leaking. I drove another 50 miles on it until I have the
opportunity to change it at a service station.

I believe that the higher pressure in the tire save the day. I could be wrong, you be the judge.

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