We have the Rocky Mounts Tandem Tailpipe that hangs our Cannondale X/M tandem across the back of my Grand Marquis. I remove the front wheel and we haven't had an issue with it. The rear wheel hangs out a little bit past the driver side mirror, but not too bad. The longest trip we took with it was from Wisconsin to Kentucky and didn't have an issue including going through construction zones and rush hour in Chicago.