All

Have a couple of questions for you. In the quest for my perfect Eddie Bauer 07 I have found two vehicles that fit my needs, one is black with 18" and one is blue with 20". I must admit that although I am not a blue lover it did look good with the Eddie package and the 20" chrome. This got me thinking about the 20" wheels on any Eddie I look at and generated the following questions:

1) Can 18" wheels be substituted for 20's after the fact or is what I'm hearing from the dealerships true which is that the truck is calibrated in the on board computer and TPM for the wheel size that comes with it only ?

2) What do you think of the ride difference between the 18" and 20"s ?

3) How is gas mileage affected between these two ?

4) How does wear get affected ?

Thanks so much

WC