Correct Tire Pressure for Bridgestone Blizzak LM-60 RFT 255/55/18 on 2011 X5 35i

I am seeking the correct tire pressure for Bridgestone Blizzak LM-60 RFT 255/55/18 for use on 2011 X5 35i. Is it wrong to assume that the tire pressure should be the same as for all-season 18" RFTs?

Recommended pressure depends on whether or not you have 3rd row, and how much you are carrying. Nifty little chart on the drivers door jamb lays it all out for you.

BMW gives the normal pressure nowadays for 4 persons and load, and uses the Gross axle weight ratings for it ( GAWR). They give them for up to maximum technical speed of the car.
Mostly they can be found on a metalish plate somewhere on the car.
In America sometimes on the same plate as the advice-pressures.
From the tire you need the maximum load mostly expressed in the load-index.
Also the kind of tire Standard Load or Extra load/ XL/reinforced( all the same )
If you find all these items , you can fill them in in spreadsheet I made.
This new normal use advice is called Heavy use in my spreadsheet.
In the nex map several spreadsheets , newest version is the savest one, even saver then factory advice, wich is made with the same system.
http://cid-a526e0eee092e6dc.office.l...0tyre-pressure
Download and open the spreadsheets in Excell-like program, and dont open it in the browser,then it wont work because of protection and data validation
If you cant work it out give me the data , and I will do it for you