Could be, but bikes on the roof of the car see a lot less carnage as well. It used to be gross, and you’d need to wash your bike after an hour on the roof, but now, not so.
There even used to be spandex covers you could out over the front of your bike on the roof rack, but I haven’t seen one in years.
There even used to be spandex covers you could out over the front of your bike on the roof rack, but I haven’t seen one in years.