City guide · King County, Washington

E-bike Laws and Regulations in Black Diamond, Washington

Rules to know

State, county, and city rules that apply in this area.

Washington

Electric bicycle classes, 2026 definition, and access

Washington defines three e-bike classes up to 750 watts, with 2026 amendments excluding devices capable of more than 20 mph under motor power alone and easily configured noncompliant devices. Class 1 and 2 path use is subject to local/state limits; Class 3 is limited to a highway or adjacent path or local authorization. Class 3 sidewalk riding is barred except specified route/authorization cases; Class 3 minimum age is 16. No statewide helmet mandate was verified.

Code
RCW §§ 46.04.169, 46.61.710, 46.20.500; 2026 c.159 Revised Code of Washington
Applies to
statewide
King County

E-bike access, speed, and conduct on County trails and park paths

Class 1 and 2 e-assist bicycles may use regional trails and paved pathways in County parks unless posted otherwise; Class 3 is prohibited on trails and pathways. A 15-mph default applies on regional and backcountry trails; riders must yield to pedestrians and equestrians and use caution and lights at dawn and dusk.

Code
King County Code § 7.12.315; Ord. 19771 § 26 King County e-assist bicycle trail rule
Applies to
countywide

Bikes to compare

Seller-listed specifications are starting points. Confirm the bicycle class and final configuration before riding.

E Bike SAMEBIKE CY20Pro 500W Motor 48V13AH Removable Lithium Battery 22MPH Max Speed 20"×3.0" Fat Tire Foldable Adult E-Bike with Dual Suspension  7-Speed Disc Brakes APP Control LCD Display for Commuting RV Camping Electric Bike

E Bike SAMEBIKE CY20Pro 500W Motor 48V13AH Removable Lithium Battery 22MPH Max Speed 20"×3.0" Fat Tire Foldable Adult E-Bike with Dual Suspension 7-Speed Disc Brakes APP Control LCD Display for Commuting RV Camping Electric Bike

Seller-listed specifications

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SUP73 Electric Bike 1500W 48V18AH battery Leisure commuting with Hydraulic Brake Electric Bicycle 20 inch tire off-road E-bike

SUP73 Electric Bike 1500W 48V18AH battery Leisure commuting with Hydraulic Brake Electric Bicycle 20 inch tire off-road E-bike

Seller-listed specifications

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COASTA CT2 26 Inch Dual‑Drive Snow Fat Tire Electric Bike for Adult 155‑190cm Rider,6000W Motor,52V 25Ah Battery,65KM Max Range,Hydraulic Oil Brake,Shimano 7‑Speed,Adjustable Front Fork,IP54 Waterproof,Max Load 180KG,APP&LED Display,UN38.3 UL Certified

COASTA CT2 26 Inch Dual‑Drive Snow Fat Tire Electric Bike for Adult 155‑190cm Rider,6000W Motor,52V 25Ah Battery,65KM Max Range,Hydraulic Oil Brake,Shimano 7‑Speed,Adjustable Front Fork,IP54 Waterproof,Max Load 180KG,APP&LED Display,UN38.3 UL Certified

Seller-listed specifications

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ENGWE L20 3.0 Full Suspension E-Bike, 1500W 48V 15Ah 60Miles, Smart GPS Anti-Theft, 28MPH Foldable Commuter Ebike

ENGWE L20 3.0 Full Suspension E-Bike, 1500W 48V 15Ah 60Miles, Smart GPS Anti-Theft, 28MPH Foldable Commuter Ebike

Seller-listed specifications

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