had a problem with the ice maker but I'm pretty sure that was an incomplete winterization rather than road issues.
in 2016 we were on a narrow 2-lane country road in southern Alabama. as we rounded a right-hand curve at about 10-15 MPH I saw that the right half of the right lane was gone...not a pot hole...the pavement was gone. 20' long, 4' wide and 8-10" deep. no way to stop in time. we rocked twice and I thought the MH was gonna tip. the resi fridge was yanked from it's brackets and fell forward landing on the kitchen counter. thankfully the counter wasn't damaged, the fridge/freezer doors stayed closed and were not damaged. point in that afterwards and for the rest of the trip the fridge operated as it should. had to have it rebolted to the frame but otherwise no problems, if it can take that kind of shock I have no worries about it running on the smooth-as-glass American roads.