I went through changing rims on my 2011 DJ Crew 3 years ago and it was a process. I don't know about now but back then because of the oddball rim size, replacing the tires was very expensive due to the limited choice and availabilty of 19 inch tires. Also, because of the bolt pattern rimm selections that actually fit were limited as well. I started with going down to 18's but eventually went up to 20's as the variety of rim selections were greater. There were more selections with the 18's and 20's regarding tires than 19's as well. The link below tells of my experience:
I'm still running the same Lexani CSS8 20's on my DJ. Hate they discontined them!