Bicycles, parts and fittings for bicycles, in particular: hubs, internal gear hubs, hub quick release levers, gear release levers, gear shift levers, front derailleurs, rear derailleurs, chain guides, freewheels, sprockets, pulleys, chains, chain deflectors, shift cables, cranks, crank sets, chain wheels, pedals, toe clips, brake levers, front brakes, rear brakes, brake cables, brake shoes, rims, wheels, spokes, spoke clips, bottom brackets, seat pillars, seat pillar quick release, head parts for frame-fork assembly, frames, suspensions, handlebars, handle stems, grips for handlebars, saddles, mudguards, kick stands, carriers, bells, horns and rearview mirrors for bicycles, derailleurs controlled by computer