Polaris RZR S 900 RackBoss 2.0 Rack and Pinion by SuperATVRackBoss 2. 0 Is a New Kind of Rack Your steering rack will eventually wear down, your steering will get sloppy, and your handling will be unresponsive.. and there used to be nothing you could do about it. RackBoss 2. 0 changes all that because its the only rack on the market that uses X24 Techour unique dual bushing design that reduces wear by over 50% compared to stock. So accept nothing less than SuperATVs Polaris RZR S 900 RackBoss 2. 0 Rack and