City guide · King County, Washington

E-bike Laws and Regulations in Mercer Island, 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.

ESKUTE Electric Bicycle for Adults – 21-Speed Gear 27.5' Mountain Electric Bike, 20MPH+, 48V 10.4Ah Battery E-Bike

ESKUTE Electric Bicycle for Adults – 21-Speed Gear 27.5' Mountain Electric Bike, 20MPH+, 48V 10.4Ah Battery E-Bike

Seller-listed specifications

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Cybervelo 20” Fat Tire Removable Battery E-Bike 1000W Peak 48V20.8ah 7-Speed Shift Electric Bike 28+MPH 80Miles Long Range EK4

Cybervelo 20” Fat Tire Removable Battery E-Bike 1000W Peak 48V20.8ah 7-Speed Shift Electric Bike 28+MPH 80Miles Long Range EK4

Seller-listed specifications

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SOCILING 14 Inch Folding Electric Bike for Adults 500W Motor Removable 48V Lithium Battery 8 Shock Absorbers Dual Disc Brake City Commuter E-Bike with LED Headlight

SOCILING 14 Inch Folding Electric Bike for Adults 500W Motor Removable 48V Lithium Battery 8 Shock Absorbers Dual Disc Brake City Commuter E-Bike with LED Headlight

Seller-listed specifications

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16"/ 20" Folding Electric Bike for Adults, 630W/ 983W Peak, Keyless Start

16"/ 20" Folding Electric Bike for Adults, 630W/ 983W Peak, Keyless Start

Seller-listed specifications

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