I am wanting to upgrade to 20" wheels, my tire guy has a new set of 20 inch tires, but I am not sure if anyone is running currently...

They would be 245/35 (i think) / R20 in the front &
275/40/R20 in the rear....

Has anyone tried this on an x5? Would this jack up my 2010 X5 3.0?

I was also thinking about just using the 275 in the front and buying 315s for the rear like the spec x5. The only problem is then I would have to buy the extended flare/ arches...this is so aggravating!