I did this, briefly. They just fit (as does the WW 2.55), but as soon as I stood to climb, rear end flex from the frame and wheel allowed the tire to touch the chainstays. So I finished the ride (seated!) then went back to a narrower tire when I got home.Wes said:Any one running a Rampage or Nevegal in the rear of a Mooto-X YBB? If so, how is the clearance, particularly between the tire and the chain stays? Thanks.