Does anyone actually inflate their rear tires at 42 psi?
#1
Senior Member
Thread Starter
Does anyone actually inflate their rear tires at 42 psi?
I noticed on my door jamb that the front tires are supposed to be inflated at 35 psi, and the rears at 42 psi.
Really?
Really?
#2
Senior Member
#3
Senior Member
Those are maximum load pressures. Most people don't normally run at max load. There is also a sticker in the fuel door with normal and max pressures. My 2015 says 33/33 normal and 35/41 max load.
I run about 38 psi all around and get 31-32 mpg on the highway. I also get fairly even tread wear. The ride may be slightly harder, but its hardly noticeable given the milage and good tread wear.
I run about 38 psi all around and get 31-32 mpg on the highway. I also get fairly even tread wear. The ride may be slightly harder, but its hardly noticeable given the milage and good tread wear.
#4
Super Member
I do 36/38 and rotate my tires ever oil change/yearly and have even tire wear, decent mpg (21 combined), and the car rides smooth.
I drive my car for 10 minutes to make sure the pressure is stable and then get the tire pressure set , when it's cold it drops to 33/35, when it's hot it goes 38/40.
I drive my car for 10 minutes to make sure the pressure is stable and then get the tire pressure set , when it's cold it drops to 33/35, when it's hot it goes 38/40.
#7
MBWorld Fanatic!
Yes that's for loading it fully. A normal load is 33, 33, I have new 19s, I tried the higher pound fill for 5000 miles, my center of tire wore 20% more. Maybe larger tires wear different, but for new 19" , 33-33 lb works better for normal driving.
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#8
Senior Member
I had my tires at 35 and 40 but the dealership said that with 20's 40 pounds all around should be fine. The ride has always been good and the tires are wearing evenly. With the 3.5L gasser and 4Matic I've been averaging 21mpg in mostly freeway driving.