I have the next up size folding one, with 12" wheels. I've been hauling 1-3 motocross bikes behind my Honda Fit on 250 mile weekends for 3 years, ~70 mph or more. No vibration, no bad behavior, still on original tires. At the trail or track I get amused looks from guys with monster truck rigs, like I'm some kind of idiot. Cost them >$100 just to drive there though (Socal BS).What's the speed rating on that thing. Can it do 75mph for 8hrs every weekend?
the KEY is to grease the hubs when you first buy it. My neighbor only got about 40 miles on a brand new one before the bearings blew up. I've regreased them 3 or 4 times in the last 3 years, should probably do it more often.