Northwood, look at their frames, made in-house.I towed a 24' Nash up the Dempster Highway, into the Canadian arctic. 450 miles of dirt road ending 200 miles north of the arctic circle.When you complete the Dempster, you get to turn around and come back.Between that and unpaved sections of highway in the Yukon and British Columbia, well over 1000 miles off the pavement. I probably hit 50 mph, occasionally, on, "smoother", sections of the Dempster. I do not recommend that.The only damage was some screws coming loose that held the stove in place. I did a lot of research before purchasing the Nash. It paid off. Northwood advertises, "off road", certainly, a relative term, but, their TTs are strong. I plan to go back to the arctic with my 30' Arctic Fox.