chamot

From the site :
https://www.wheel-size.com/size/mercedes/amg-gt-4/2019/

Is the above dimensions correct for GT4door 53?

From Vossen wheels, CV10
https://vossenwheels.com/wheel/cv10/


If I want to fit
a pair of 20x10" , 5x112+30 deep concave to the front (Tire : 265/40R20)
a pair of 20x10.5" , 5x112+30 to the rear (Tire : 295/35R20)

will the clearance be enough for the front wheel to fender and spring?
Any handling issue with 4matic+ ?

Thanks!

NovaOne

The wheel specifications look correct as far as I can tell.

When you go up on the offset, the wheel will be moved more in wards. Since the 21" wheels have a +30 offset, I don't think you'll have any clearance issues running +30 on 20" wheels. But the effect will be that the wheels will look more "tucked in", and less flush with the sides of the car. You can of course fix this with 10mm spacers on the back and 5mm spacers on the front.

I myself am not a fan of spacers, but if you are not too crazy with your driving, they'll be fine. Personally, I'd go with the 9Jx20 front rim, which already has a 25 offset, which is nearly an exact match for stock.