My 97 Mountain max has the 136X2 Camo Challanger on it. But it is listed as 8CC. If it is 15 wide and 2.52. I would say it is on a pre 2000 Mountain max 600 or the 136 Mountain max 700. I am still running the original track on my 97. I also have a 2001 MM700 that I had to change the track out on. Stock was a 141 Yokohama (Yokoload).