I found that with 19" wheels on, my car did tramline a little more, and the steering felt slighty beefier, and the ride slightly more fidgety. The upside is great traction, and looks, however, the 18" Rays are really light, and as said, if you were going to track it on a regular basis, then id stick with the 18". Tyres are cheaper for 18" too. You would need to spend serious money to get 19" wheels anywhere near as light as the Rays.