I've got 18" Klaws w/a -2 swingarm. I've ran 20" Razr's, but they don't compare to the Klaws on an MX track. If you're thinking about the -2, and don't want to fork out a bunch of money, give Gary a call at Quicksand. Cheap, and looks good too, it's hard to tell it's cut and re-welded.