satzzz_08

Hi All,
I recently got brand new Michelin Pilot Sport All Season 4 tires for my 2016 W205, Base model car.
The steering vibrates when I am at around 70mph. Checked wheel balancing and alignment and everything is good.

Old tires Config: Continental Pro Contact
245/40 R18 97H
225/45 R18 95H

New tires Config: Michelin Pilot Sport All Season 4
245/40 R18 97Y
225/45 R18 95Y

No modification were done to my car other than adding mud flaps to my car after I got new tires.
What could possible cause this? No history of accidents and all services done on time

Cosworth2000

What is the PSI?

satzzz_08

when driving, front is 41-42 and rear is 48-49

Cosworth2000

Holly crap.. that is way to high. You should not be more than 38-39psi all around

satzzz_08

Wow.. Thank you. One would think the guy who installed the tire should know this

Cosworth2000

The tire pressure is on a label on the inside of your driver door sill.

satzzz_08

Yeah. It reads 39 front and 45 rear

MaverickC43

The tires prob list a higher psi on them the installer may have looked at that

satzzz_08

Maybe

Kush Desai

Your gascap door also has the PSI for the tires for normal load and max load. I tend to keep all my tires around the 37-38psi mark.

Same thing happened with me when I got my new tires installed, I checked the tire pressure and were way too high (40 in the fronts and 49 in the back).

satzzz_08

Thank you so much. Will do it today.