Yeah it really doesn't matter how much smaller of a rim you buy as long as they clear the brakes and the shop puts on tires with enough sidewall to get the overall height back up to what its supposed to be, so going with a size that gives you the most options for tires is the best bet.
Originally Posted by bastinado
it looks like there is a procedure for deactivating the warning light with winter tires written in the owner's manual.
What page number? I have been slowly working my way through the manual finding little nuggets of helpful info, like the holding the traction control button longer to turn it 'more off' but I hadn't seen anything about being able to disable TPMS warning, that would be a game changer for me because I too have been looking at winter tires and rims but the added cost of a second set of TPMS made me not so happy.
EDIT: I found on page 169 a section/feature called "TPMS Deactivation — If Equipped"
It seems there is no procedure or anything, it simply says IF you have this feature then you can put on rims without TPMS sensors and it will only fire a dash warning the first time you drive it on the rims without sensors. After that it won't show any warning or beep on subsequent startups, and once you put your stock rims with sensors back on after one drive the TPMS system should start back up and return to working as normal.
The super super key part of this whole thing is in the title, "TPMS Deactivation — If Equipped
I got on Jeep customer support chat and asked them if they could tell from my VIN# whether I had this feature. What I got was a fancy way of saying "I don't know, probably not, ask your dealer."
I am suspicious this feature is not actually equipped or available on any Compass sold in the United States. I think our TPMS laws are too strict for it probably, but they have this nice feature for the rest of the world. This is just my guess, I sent an email to Jeep to see if I could get some clarification and also I probably will stop by my dealership at some point and pick their brains.
I am not going to hold my breath though. You should check into this further as well bastinado if you care about whether you have to stare at a blinking light for the first 75 seconds of EVERY drive all winter (after 75 seconds it stays on solid).