Does anybody know what max tires we can put on a 2018 e53 amg. For front and rear.

Max wheel diameter, or max width tire size? Or max tire height/ratio (probably not). The max tire diameter is pretty much always the same (unless you're raising it way up and turning it into a Chevy Impala.

Ya, you sure don't want to go over on the diameter of the tire over what it is. I know on my Amg line Cabrio 450 there are 275-35-19's on it now, I think it's the same on the E53. I'm pretty sure you could go 305-30-19. It's 3/10s of inch shorter so pretty close. I would not do it though as I know the sides of the car are gonna get dirty a lot faster as the tires are gonna stick out of the fender more. Not really sure about the front, you need to look to look on a tire chart to see what sizes match up similar in diameter to what is on there now but wider. https://www.tirerack.com/tires/tires...XLV2&tab=Sizes Look under specs and you will see the charts. The real problem could be a lot of places will not put anything other than OEM sizes on cars because of Liability, I don't blame them.

You can run 21s if you have a low enough profile, I think 275/25 r21. Try keeping same overall diameter, with either larger rims or larger sidewall.