Quote:
Originally Posted by Dackelone
Hi Tom,
Sorry for going OT, but...
My car is a 2010, 135i 6sp manual. My door jam sticker says this:
36/39 psi for 18" summers (under 100 mph speeds!)
38/42 psi for 18 summers (OVER 100 mph speeds!!)
I guess since my US spec car was delivered in Germany I get this added yellow decall!  I also got the 155 mph speed limiter. Although I have not tested that out - yet! My winters are only good for 130 mph!
In my owners manual I found specs for my 17 winter tire pressures:
33/36 psi winter (under 100 mph speeds!)
38/42 psi winter (over 100 mph speeds!)
It also lists the pressures for 18" winters
215/40R18 36 psi (38 psi over 100 mph)
245/35R18 39 psi (42 psi over 100 mph)
I don't really know why anyone would go with 18 inch winters - you want the skinniest and tallest tires for winter performance anyway. Only thing I can think of is for people who don't want to buy a 2nd set of wheels for winter duty.
Like I said in my original post: I run 34 & 39 psi in my 17's winter setup. I find it the best compromise. but run what works best for you.
bye,
David |
I have the same two stickers on my 2008 135i that was delivered here in Georgia. The main sticker differs by saying to run 36 PSI all around for under 100 MPH. I wonder why they changed it in 2009?