Yeah in that case, I wouldn't kill the tires on pavement either. As far as the stress is concerned, I was was only concerned about the angle, in use the stress wouldn't come from that angle--typically. Yeah as long as you are careful your biggest concern will probably be from gawkers running into you or police questioning you, but it isn't really any different than a trailer. I would run a blinking red light on the back or at least a red flag to meet any requirements.