[arpad_m]

These OEM wheels are so darn expensive even at hubcaphaven that I'd simply wait for a member or someone on facebook to let go of their set cheap when they upgrade to a wider setup, and you may even score a wheel+tire combo deal. And if you wait until your current tires are almost spoken for, you won't have wasted their tread life (you might also be tempted to do a couple burnouts to help them along, heh...)

Originally Posted by hfur

...and by changing the 18 inch to 20 inch will that disrupt anything in the speedometer or computer of wheel tire pressure warning light? anyone ever do this?

The tires will be different for the 20" wheels, you'll have much less sidewall, so the overall wheel+tire height can be kept very similar to your current setup. As long as it's within ~3% and you don't change the rake (front/rear height ratio) excessively, you should be okay. The speedo might be a little off, but probably not by much. You can check the impact of various tire sizes yourself at https://tiresize.com/comparison.