New Rear Tires causing no speedometer and all dash lights on

[reckedz]

Hey guys! I have a 7AT 370z. I just got new rear tires on and the car now has all dash lights on (Christmas tree), rev match not working, and speedometer not working at all. I’ve read that if the diameter is too different from the front to rear it will throw it off like this. Have already driven 200+ miles and codes cleared but no help. My wheels specs are: FRONT- 20x10 +28 REAR- 20x11 +12 the new rear tires are 305/30/20 and the front is still 255/30/20 (Used to have 285/30/20 in rear) I assume if I replace the front tires to a different size it will fix it but I need help figuring out what size will work and fix my problem. Thanks for the help!