I have a 03 LXE with 16 inch wheels and P215/60R16 Bridgestone tires. Because I believe the tires are causing my tracking problem, I want to return to the 15 inch rim with 205/65R15 tires. Has anyone done this? If so, what may I expect?

Follow-up. Wanted dealer to switch from 16 to 15 inch wheels. Found that they cannot do it because the rotors are too big.