I claim to be a car nerd, but I am still learning somethings. What type of impact does changing/upsizing your rims and tires from factory have on a vehicle. I will be ordering a V6, but want to put 17" polished bullitt's on my car. Will it impact my traction control, and how/when do I change my speedometer?

Thanks for the info!!!

 

It won't have any affect and you won't have to change your speedometer as long as the diameter of the tire does not change.

 

Thanks for the info holderca1!

 

I thought the V6 came with 16" rims? Doesn't that mean you would have to adjust the speedometer? If you want the best bang for the buck, put some wider tires on your existing rims.

 

Rim diameter doesn't matter. It is the tire diameter, as holder said. you wil just have to go with a lower profile tire on the 17" in order to have the speedo correct. Here is the link to a quick calculator.

http://www.net-comber.com/tirecalc.html

 

What kind of issues can arise from not adjusting the profile of the tire. In other words, lets say I wanted to fill up the wheel well a bit more, and didn't want to lower the car, so I put 18' 255/55's on. This would fill up the well more, without lowering the car, but I have heard that it can cause trouble with the brakes, anyone know if this is true? Any other issues crop up from doing this?

 

I believe, and I am not entirely certain, but sometimes putting larger tires on the car can effect your rear-end ratio, gas mileage, brake dynamics, and obviously your speedometer. However, I think simply going up 2 inches in diameter will not cause any of these problems to a great degree, except for the speedometer. The one problem I would be worried about was the tire rubbing against the inside of the well with that increase in diameter. Someone else back me up here. As I said, I am not entirely certain.