600trip, I think you are wrong. I don't think they give you the option of different tracks, because they would have to have different tunnels. I think that the sno pro option gives you stiffer springs and valving.
If you look at the other ZR models, they give you a std. or sno pro option. I think that the chassis remains the same but the spings and shocks are different.
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If you look at the other ZR models, they give you a std. or sno pro option. I think that the chassis remains the same but the spings and shocks are different.
