For sure, a normal "cargo" trailer doesn't work for us, with so much concentrated weight on rear ZTR/WB tires. I went with 16"OC floor crossmembers, but, 12"OC is possible, too. I bought Maxxis 10-ply tires, as extra insurance. I was fortunate that one of my clients is a trailer dealer and he helped me order the right trailer. He alerted me to several things I hadn't thought about. I'd probably do a 48" side door, if I had to buy another.