Tire/wheel upgrade

I want to upgrade from 18 to 20 inches tires/wheels. I'm looking at upgrading to 255/40-20 front and 285/30-20 rear. Tirerack says the most I can go in the rear are 295/25-20 Mich/pilots or the size will affect abs and computer...........is this correct?

Your ABS and Tracking control is based on your wheel rotation, If one wheel is spinning faster than the other then ur tracking contrl will kick in left and right. As for the ABS, same deal. Thats just what i read somewhere.