Rule #49: Keep the rubber side down: It is completely unacceptable to intentionally turn one’s steed upside down for any reason under any circumstances. Besides the risk of scratching the saddle, levers and stem, it is unprofessional and a disgrace to your loyal steed. The risk of the bike falling over is increased, wheel removal/replacement is made more difficult and your bidons will leak. The only reason a bicycle should ever be in an upside down position is during mid-rotation while crashing. This Rule also applies to upside down saddle-mount roof bars.