Suspension systems for bicycles; structural parts for bicycles; bicycle parts, including, suspension linkages, derailleurs, handle bar stems, front fork joints, forks, fork crown covers, drive trains, brake shoes, handle bar ends, disk wheels, gears, gear wheels, freewheels, cranks, pedals, pedal cleats; components for bicycles, including, headsets which provide a rotatable interface between the bicycle fork and the bicycle frame; wheels, wheel rims and wheel hubs for bicycles; bicycle brakes and brake lever grips; bicycle seat posts; suspension systems for bicycles; bicycle motors; bicycle frames; bicycles; air pumps for two-wheeled motor vehicles or bicycles; and shock absorbers for bicycles