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The width with tracks sounds pretty wide, most trailers are 8 feet wide inside plus fenders. I would buy a 18 foot trailer, because I'm always finding something I want to load up with my S X S like wood splitter, dirt bike and wife if she's getting on my nerves. HAIts already just shy of 64 inches wide and if I had to bet, you will probably add at least 12-18 inches to each side. This puts you at just shy of 8.5 feet wide. As for length, I would play it safe with and get at least a 14 foot long trailer. In my opinion, once you get 14 + foot long, a 2 axle trailer will be much better.
That thing will be wicked with Tracks!!! Make sure you post some pictures!! Good luck and enjoy @DTC !!!
Unless you go with a bed over the tires and I think they are 9 feet wide, pretty tall trailer which would be great for rough terrain. Not so great for corners on the hi way.The width with tracks sounds pretty wide, most trailers are 8 feet wide inside plus fenders. I would buy a 18 foot trailer, because I'm always finding something I want to load up with my S X S like wood splitter, dirt bike and wife if she's getting on my nerves. HA