05/06/2026
The Difference Between Bicycles and Motorcycles
With so many different options now on the market, it’s especially important to understand the key differences between bicycles and motorcycles. The Castle Rock Police Department wants all riders to be safe and avoid costly infractions.
Washington State law clearly defines the difference between a bicycle, and electric-assisted bicycle, and a motorcycle.
Bicycles have pedals. Washington State law RCW 46 .04.169 defines three classes of electric-assisted bicycles. Electric-assist bicycles have a maximum speed of 20 mph (when pedals are not being used), with the use of pedals, the maximum speed is 28 mph.
The vehicle in the image is a motorcycle, not a bicycle. A motorcycle is only powered by a motor, regardless of whether the motor is battery powered or powered by fuel. A motorcycle does not have pedals. Foot pegs are not pedals.
This electric motorcycle is NOT legal to ride on any street (or sidewalk) in Washington State, as it lacks many required safety features.
Please be aware that all motorcycle riders are required to have a state permit (eligibility starts at age 16), or endorsement (must be 18 or older).
What makes a motorcycle “street legal”
The Washington State Department of Licensing explains what every motorcycle needs- in order to become legal to ride on Washington State roads:
A headlamp that meets the requirements of RCW 46.37.523 and 46.37.524 and is used whenever the motorcycle is in motion on a roadway.
A tail lamp that meets the requirements of RCW 46.37.525.
A stop lamp that meets the requirements of RCW 46.37.525.
Reflectors that meet the requirements of RCW 46.37.525.
Brakes that meet the requirements of RCW 46.37.527, 46.37.528, and 46.37.529.
Mirrors on both the left and right handlebars that meet the requirements of RCW 46.37.530.
A horn or warning device that meets the requirements of RCW 46.37.380.
Tires that meet the requirements of RCW 46.37.420 and 46.37.425.
Turn signals that meet the requirements of RCW 46.37.200.
Fenders that are adequate for minimizing the spray or splash of water, rocks, or mud from the roadway. Fenders must be as wide as the tires behind which they are mounted and extend downward at least halfway to the center of the axle.
A windshield that meets the requirements of RCW 46.37.530, unless the driver is wearing glasses, goggles, or a face shield conforming to rules adopted by the Washington State Patrol.