255/45/20 Front 285/40/20 Rear ?

[RKelley223]

Hi, I have been searching but cant seem to find the answer I'm looking for.
I have picked out a set of wheels that come in Front 8.5x20 Rear 10x20 and the only size I think might work is the 255/45/20 front and the 285/40/20 rear. Has anyone ran this set up or do you have any suggestions on other sizes?

Would it be best to buy 4 rears and just run the same size all around?

thanks

Richard