When buying tyres for your G63 AMG from Tyres.co.uk, there are two options that include 275/50 R20. The first is the Michelin Pilot Sport 4 SUV, and the second is the Pirelli Scorpion Zero Asimmetrico. Both of these tyres are good for the G63 AMG that has factory-fitted 20-inch wheels. Depending on the variant of your G63 AMG, check the load index, speed rating, and XL markings on the placard and the sidewall.
The Mercedes G63 AMG carries its tyre pressure specifications on the fuel filler flap. The tyre pressure placard on the G63 AMG has the approved wheel sizes and their respective cold tyre pressures. Should you update the factory wheel fitment, refer to the tyre sidewall and the handbook.
The G63 AMG does not always need all four tyres swapping at once. With the G63 AMG's permanent 4MATIC four wheel drive system, if a single tyre is replaced, the other tyre on that axle needs replacing as well. When two tyres are replaced, it is a UK standard to fit a matching pair on the rear axle.