How long did the zen drive take? Just curious. We first drove in a SUV, no problem...I don't think it's the clearance as much as the chicken heads all over the road. Every car that passed us going/coming got a flat; one numnut in a minivan got two flats on the way out. His boy scout troop caravan were scratching their heads on what to do next. Took us about an hour from what I recall driving prudently and stopping for other cars along the way.