i8maxxer

so i have been out of the game for awhile, i just dusted off the old revo that i got back in 06. I'm looking into getting the badlands for it and have seen that most people are stretching them over lpr rims. Now i still have the old 15mm hexs, are there any rims options that i can use for the badlands or should i just upgrade to the 17mm. also if anyone could answer what lpr, or vtr stands for that would be great.
thanks i8maxxer