RZR 900's are all 64" wide whether 2 or 4 place. Some of the 800's are 60" wide and some 50" wide. Google the Polaris site and you can compare all specs. They also make RZR's that are smaller specially for trail, 500's I think. I have the 900 4 limited and love it. Much smoother ride that comparable 2 place which can buck like a bronc if not careful. Also the two place will tip over backwards when climbing and the 4 won't (at least so far). They are all fun. The 800's and 900's all have more power and speed than most folks will ever need or want.