Hello everyone,

I have some general questions... So here goes! I am purchasing an 08 GXP with 40k on it.

Question 1. Can I run one size tire all the way around without messing up the speed reading in the car? If so, what size?

Question 2. Is there a way to run your high beams and low beams at the same time?

Any help would be great. Hopefully I can help someone after I learn more about this car.