Bicycles; bicycle parts and components; change-speed gears for bicycles; bicycle brakes; bicycle brake grip; brake calipers for bicycles; brake linings for bicycles; bicycle brake cables; brake cable housing for bicycles; bicycle flywheels; bicycle chains; bicycle frames; bicycle prompt disassembly device; bicycle hubs; bicycle seat posts; bicycle handlebars grips; bicycle handlebars; bicycle handlebar stems; bicycle pedals; bicycle rims; bicycle cranks; bicycle transmission gear set; derailleurs for bicycles; electric bicycles; bicycle brake discs; handle bar ends for bicycles; bicycle transmissions; chainwheel for bicycles; wheel for bicycles; gearing for bicycles; gear selector for bicycles; stem assembly for bicycles; quick release skewer for bicycles; steering controller for bicycles; cap for derailleur lever for bicycles; axle for bicycles; bicycle bells; direction indicators for bicycles.;