Tire pressure question
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Joined: Nov 2014
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From: Chicago burbs
2015 S550
Tire pressure question
My S600 has the staggered wheel setup. It came with the ugly 18" chrome dish style wheels, which I now use as my winter wheels. On the stock setup with OEM summer tires, the door sticker says 32 psi all around.
With my knock-off AMG 20" staggered summer wheels, I go with 38-40 psi at all corners (after looking at what the S65/63 run on their stock 20's), and they seem to wear pretty evenly.
I have snow tires on my 18" stock wheels at 255/45/18 all around. On the rears with the wider wheels, the middle of the snow tires have worn a lot quicker than the outsides after running 32 psi all around for the last 2 winters. The fronts are perfectly fine with the 32 psi and are very even. Given that the rears have a slightly shorter profile with running 255's instead of the normal 275's, does anybody have any idea what kind of PSI I should be running in the backs to give even tire wear? This is definitely a heavier car than an S550, although most of the extra weight is in the front. I'd go with 275's for the rear, but it's impossible to find matching snow tires at a reasonable price for the staggered setup.
With my knock-off AMG 20" staggered summer wheels, I go with 38-40 psi at all corners (after looking at what the S65/63 run on their stock 20's), and they seem to wear pretty evenly.
I have snow tires on my 18" stock wheels at 255/45/18 all around. On the rears with the wider wheels, the middle of the snow tires have worn a lot quicker than the outsides after running 32 psi all around for the last 2 winters. The fronts are perfectly fine with the 32 psi and are very even. Given that the rears have a slightly shorter profile with running 255's instead of the normal 275's, does anybody have any idea what kind of PSI I should be running in the backs to give even tire wear? This is definitely a heavier car than an S550, although most of the extra weight is in the front. I'd go with 275's for the rear, but it's impossible to find matching snow tires at a reasonable price for the staggered setup.
