So I've been looking at buying a set of 16" rims to put my summer tires on and then put winters on the steel rims.

Any 16" rims from other Dodge's fit the 2012 Grand Caravan ? I heard the Journey rims fit but the local dealer says no.

As you call know bolt pattern 5x127

 

or 5 x 5" and a 71mm hub with a 20mm offset.
Also remember that you should have Tire Pressure Monitor System TPSM sensors mounted on each rim for a purchase cost of $65 each.

I ordered an $80 set of 4 sensors off Ebay, we will see what I get.
Still looking for winter rims myself.

Any problem with running 215/70R16 winter tires instead of the 225/65R16?

 

5 lug 5 inch or 127mm High Positive Offset
H = High Positive or FWD (Front Wheel Drive) typically +45, 40, 35 offsets
71.5" hub.

this is atleast on the 17" wheels set on my 2010 sxt

20 offset sounds not right? might be ok for 16" vehicles though

 

I have a set of 16" steel wheels and journey hub caps, I purchased them separate, wheels ARE from a 2010 T&C, however if your van has dual piston front brake calipers, as my R/T does, these wheels will not work. As this is why i am selling.

 

215/70R16 Michelin winter tires worked well instead of the 225/65R16 stock size.
The $80 ebay sensors work fine, and bought steel rims from dealer for $288.