Re: Replacing 20" rims with 18" on 2011 Overland
If you use the OEM size tires on those wheels, both the 18s and 20s will have the same diameter and do not require speedo calibration. I have a set of both wheel sizes and there are no swapping issues.
All WK2 tire pressure sensors are identical regardless of trim level (and the same as those used on some other chrysler products). There are some feature differences between the modules that detect the sensors, however, but the wheel senors will work on all WK2s.