Non RFT tires 20" staggered Options??
We have a 2018 GLC 43. Since day 1 my wife has hated how rough the ride is, its finally time to change out the pure crap Goodyear run-flat tires and I'm definitely going regular tires to help smooth it out. The options in this tire size are real slim pickings, the fronts are 255/45/20 and the rears are 285/40/20. The only option i'm finding that is a full set are the Falken FK 460A/S. We live in the FL panhandle so winter handling is a non issue, either looking for summer tires or grand touring all seasons.
Being that the car is all wheel drive; what other tire sizes can work on the car without effecting the all wheel drive system? Many years ago I had a bmw 550 xdrive which came with a square wheel setup, i changed them out to an aftermarket staggered setup with no issue. I remember there being some variance you're allowed to go before you have any issues.