Trunk mountable bicycle carrier racks and various improved aspects thereof such as retractable spool mechanism, cable end-hooks, anti-sway device, improved rotatable hubs, and improved frame supports. Methods using the polypeptides to identify compounds that modulate the protease activity thereof are provided. The cane is balanced and is now able to act as a table which will support the magicians tophat on top of the card on top of the cane. The invention is particularly useful as applied to check an LPC bus protocol. Therefore, the method can make the starting process of the electronic device more intuitionistic. The assembly further includes at least one of the exhaust pipes or pipe shaped portions including means adapted to reduce the pressure of exhaust gasses passing there through at a position downstream of the balance pipe or pipe shaped portion.