Hello,looking for some info.just bought a 2012 grand caravan for my wife
it has 235/60/16 tires on it.would like to put 15in on it.is there any cross
reference charts out there for this.if not can I go to 215/65/16.thank you

 

Going to the 215/65/16 shouldn't be an issue as they are roughly equivalent in size. I used this tool online: http://www.miata.net/garage/tirecalc.html

As far as going to a 15, you're going to need different wheels that will match the bolt pattern. The tires may be a hair cheaper, but you'll be looking at new wheels (unless you already have some or something...)

Hope this helps!