If you have a pass through you can store the bike there out of the rain and not have to worry about the bike rusting,falling off, or being stolen. I store mine in my pass trough and my wife's in the trunk of the tow car with the wheels removed. Also when we go into town and she goes shopping which I don't particularly like to do I will assemble hers and explore the surrounding area. Another reason I like to keep one in the trunk of the tow car is when your sight seeing takes you to the top of a Mountain it is fun to ride downhill on the bike. Just my thoughts.