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Tire Pressure

11502 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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My 2 cents worth... I have the Dunlop 8080e's and I too got all the conflicting info. The car came from the dealer with 38/42. This was a little too soft for my liking and after consulting with them, I raised the pressures to 42/45. This seems to be a good compromise as the car handles well at high speeds and corners well too. The ride stiffens up a little and this is great in my opinion. This IS a sports car!

I ran the tires for a week at 45/48 and while the steering feel gets a little lighter, I felt I didn't need that harsh of a ride. True, the traction control engaged with hard acceleration or agressive cornering. Everyone I talked to says keep them above 40 all around. I agree. Watch for uneven wear, especially on the front tires. If you corner agressively, increase the pressures into the mid to upper 40's. The Michelins should run the same way. The car manual does not know what brand of tires (ie the rating)that will be put on the car and most likely has a wide safety margin built in. The door sticker is much more accurate. The local Dunlop dealer said to run them as high as you can stand up to the maximum if doing serious performance driving, however said to back them off at least a few pounds for everyday driving. They do a lot of high performance cars and seemed to know exactly what the answer was.

Has anyone ever asked this question at the driving school?
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