I have a 2008 Sportsman 300 and just received a Pure Polaris replacement belt. When I went to remove the old belt, I took note of the belt number, still clearly visible, on the old belt - ending in 108. When matching up the new belt -ending in 129, I notice they are exactly the same size. So anyways, I put it on, fits fine, machine runs and drives fine. Doing a bit more research, I find another Polaris belt, part number ending in 164, which is also an OEM fit for this machine. So that’s 3 belts that can be used for the Sportsman 300 ???? Can anyone enlighten me here ?? Has anyone else run into this ?? I’m comfortable my new belt is fine, but why 2 others that can be used on this model ??? Inquiring minds.