RZR XP 4 1000 Tire Fitment on a Stock ’15 XP4 1000 July 27, 2015 Looking at putting 15" MSA M21 Lok with 30" or 31" Motohammers. Will I have a fitment issue with a stock 15 XP41000? Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related