We carry ours on a trailer, most of the time behind our fifth wheel - mostly at 60-65 mph. We do tow the trailer with just the pickup truck where it is less protected - however, only about four miles of it is at 55 mph. We have no touble with the top.
Our CC faces forward but we fold the top of the windshield down - no problem with that so far.
The only trouble we have had was the five-way mirror coming loose. I have added tightening the mirror and checking other items to the loading procudure.
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2002 Club Car DS IQ, folding windshield, 20 amp 48-volt to 12-volt reducer, unique key switch, LED headlights, taillights and CHIMSL (CenterHIghMountedStopLight), 5-panel mirror, storage tray, hours meter, battery condition meter and Race Star graphics.