What is the best estimate for the mass of a bicycle?

The average mass of a standard adult bicycle is between 20 to 30 pounds (9 to 14 kilograms). However, this can vary depending on the type of bicycle, the materials used, and any additional accessories or components added. Some lightweight racing bikes can weigh as little as 15 pounds (6.8 kilograms), while heavier mountain bikes or cruiser bikes may weigh up to 40 pounds (18 kilograms) or more. It is best to consult the manufacturer's specifications for the most accurate estimate of a specific bicycle's mass.