There is also a new product out, I believe it's called the Tailgate Buddy or something like that. Saw it in UTV magazine...two solid metal bars that attach where your tailgate cables are to take the stress off. Looked like they would work fairly well.
I'm not sure if you're running a regular RZR or a RZR-S. My buddy has a RZR with 3" lift and easily fits 28's, the RZR-S fits them without a lift as it's stock with 27's.