Tire Pressure--Check It!

Today I checked the pressure in my 650i convt. tires after taking delivery about 2000 miles and almost two months ago. Very foolish of me not to check sooner. I asked the service tech when I was in the delivery orientation about pressures and he assured me that they checked them. Today they were all below about 5 to6 psi (cold), with the fronts about 27 psi and the rears about 32 psi, vs mfg. recommended pressures of 32 psi front and 38 psi rear. (I use a digital guage that shows one-half psi increments.) After correcting the pressures, the car not only handles noticeably better, but tire wear and gas mileage will also undoubtedly improve. I do recall the tech asserting that the mfg recommended pressures were too high, but I do not recall his reasoning. Funny how they can go with their subjective settings on some things and for others it is strictly by the book.

Not sure what tires u have as my sport pkg tires on coupe are 33/39 recommended and I would expect vert to be even higher. In any case I have run +/- 1 psi since taking possesion (including checking on delivery when they were 50 psi!!). Will just now change tires at 28,500 miles with very even wear except for the negative camber on rear causing insides to wear a little more.
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US '05 645 Coupe, Silver Grey, Chateau, Sport, Premuim Audio (Logic 7), HUD, Cold Wx Pkg, SIRIUS Sat Radio, Delivered w/CIP 15.2, Aux Input, using Cingular Motorola v551 (v557 as of 1/7/06) Bluetooth implementation w/ snap in adapter, V1 - not hardwired. Status Born on 1/25/05, baby delivered 2/25/05, broken in 3/25/05 Upgrade to CIP 16.2 on 3/15/05, upgrade to CIP 20.02 on 3/17/06 w/MP3 enabled - Great, great BMW!!

I have 20K on my set. I am thinking maybe I should change over to a new set... What do you think?

GMANEnjoy the drive...

32 and 38 psi, but I probably could run them at a few lbs higher without any problems, even in the summer. BTW, The Bridgestones are excellent tires. I had them on my 03 CL55 and after running Dunlops, Contis and Michellins on a couple of CL's and an 03 SL my choice is Bridgestone 050's.