I currently have a 2006 2LT with stock 17" low profile (50 ratio) tires. TireRack.com tells me the "Preferred Package" is a set of larger profile (60 ratio) winter tires on 15" steelies. I know the speedometer reading will be off by a mile or so. They told me on the phone that the clearance around the calipers will be just fine, even when dropping from 17 to 15.... should I trust this?

Thanks!
Andy

 

If yours is a non SS you will be fine.

 

Just for the record - why are they considered "Preferred Package"? I just got a decent quote on 215/50/17s studded for around $600 installed. I like that because I don't have to buy rims, and I get studs as well.

 

If you go to 15" tires you could find a little softer ride as well depending on air pressures. I went from 16" to 15" on my Venture Van and it made quite a difference in the ride quality. More sidewall to absorb the shock. Depending on your air pressure you may find a slight bit less response as well.
Tire construction and tread designs can both make a difference as well if you are alert and sensitive to your vehicles ride and handling.

 

You can check with this calculator.

http://www.rims-n-tires.com/rt_specs.jsp