I would call them and ask them
I would call them and ask them. I did, and they were full of info/questions. Do you want to look over it, or through it, do you want a little wind or no wind. I run the 15", and I am 6 foot, with a 30" inseam, lowered seat. I like wind, I like my sunglasses to stay on so 15" is just right, but they are the expert.
Trailers are for Boats!!