Bicycles, fixing devices for bicycle accessories, namely attachments for hand bells, bells, brakes, chains, pedals, bodies, handlebars, wheels, hubs, rims, spokes, mud guards, rods for mud guards, pumps and spare parts thereof, fastenings for pumps, pump supports, pump connectors and their endpieces, saddles, kickstands, pneumatic tires, toe clips, securing straps for toe clips, compressed air cartridge holders, water bottle clips, vehicles, apparatus for locomotion by land, air or water