Electric bicycles and California law

E-bike law in California has changed three times in four years, and the changes matter to a claim. Whether a device is legally a bicycle decides which rules applied to you, which insurance may respond, and what a defence can argue. This is general information, not legal advice.

The three classes

An electric bicycle is a bicycle with fully operable pedals and an electric motor that does not exceed 750 watts of power. Within that:

• Class 1 — pedal-assist only; assistance ceases at 20 mph.
• Class 2 — throttle-assisted; assistance ceases at 20 mph.
• Class 3 — pedal-assist only; assistance ceases at 28 mph; must be equipped with a speedometer.

A rider on any of the three generally has the rights and duties of a cyclist, which is what brings in the rest of the bicycle rules.

Sources: Veh. Code, § 312.5 (electric bicycle classes and the 750-watt limit). Last amended Stats. 2024, ch. 791 (SB 1271), effective January 1, 2025 — within the last three years. § 21200 (rights and duties of a bicyclist).

Three recent changes, all of them live

Bikeway access, 2023

AB 1909 removed the prior blanket prohibition on Class 3 electric bicycles and motorized bicycles using bicycle paths, bikeways, and bicycle lanes, and instead authorised a local authority to prohibit an electric bicycle, or a class of them, on an equestrian or hiking and recreational trail. So the default flipped: previously closed bikeways are open unless a local authority has said otherwise.

Certification and the hard cap, 2026

From January 1, 2026, a new e-bike or e-bike battery sold, leased, or distributed in California must be certified by an accredited laboratory to a recognised standard — UL 2849 for the electrical system or EN 15194, with UL 2271 covering battery packs. SB 1271 also removed the "continuous power" language from the definition, which makes the 750-watt limit a hard cap at every moment of operation rather than an average. A motor that can briefly exceed it is no longer legally an e-bike.

Lights at all hours, 2026

The one riders miss. Since January 1, 2026 an electric bicycle must carry the rear red reflector or light during all hours — not only when operated in darkness, which remains the rule for a conventional bicycle. In a daytime collision a defence that previously could not raise lighting at all now can.

Sources: Veh. Code, § 21207.5 (Class 3 bikeway access — amended by AB 1909, Stats. 2022, ch. 343, effective January 1, 2023); SB 1271 (Stats. 2024, ch. 791 — certification to UL 2849 or EN 15194 and the 750-watt hard cap, operative January 1, 2026); § 21201(f) (an electric bicycle must comply with the rear reflector or light requirement of subd. (d)(2) during all hours — added by AB 544, Stats. 2025, ch. 36, effective January 1, 2026).

When a device stops being a bicycle

This is the consequence that matters most and is least understood. A device that exceeds 750 watts at any moment, or that lacks operable pedals, or whose assistance does not cut off at the class speed, falls outside the definition. It may then be treated as a moped or a motor vehicle, which brings licensing, registration, and financial-responsibility requirements that a rider has almost certainly not met.

Two practical consequences. Insurers look for exactly this, because it opens arguments about whether the rider was operating an unregistered, uninsured motor vehicle. And modified or de-restricted machines — the aftermarket controllers and firmware unlocks sold to raise output — put a rider on the wrong side of the definition without their necessarily realising it.

Keep the bike, unmodified and unrepaired, and expect its controller and motor rating to be examined.

Why firms say no — including the statutory bar that can apply to an uninsured owner of a motor vehicle.

The rest of the rules still apply

• Traffic signals and stop signs, the same as any cyclist.
• Lane position, with its exceptions — see bike-lane collisions.
• Riding under the influence, which is its own offence for cyclists.
• Helmets — required under 18, and argued as comparative fault at any age. See helmets and comparative fault.

Sources: Veh. Code, § 21200.5 (cycling under the influence); § 21202 (lane position and exceptions).

Common questions

What are the three e-bike classes?

Class 1 is pedal-assist with assistance ceasing at 20 mph. Class 2 has a throttle and also ceases at 20 mph. Class 3 is pedal-assist ceasing at 28 mph and must have a speedometer. All three must have fully operable pedals and a motor not exceeding 750 watts.

What happens if my device is over 750 watts?

It stops being an electric bicycle as a matter of law, and may be treated as a moped or motor vehicle instead — which brings licensing, registration, and insurance requirements it almost certainly does not meet. Since SB 1271 the 750-watt limit is a hard cap at every moment of operation, not an average.

Do I need a rear light in the daytime?

On an electric bicycle, yes. Since January 1, 2026 an e-bike must carry the rear red reflector or light during all hours, not only in darkness. It is a recent change and most riders do not know it.

Where can I ride a Class 3?

Since 2023 Class 3 e-bikes are permitted on bikeways that had previously been closed to them, though a local authority may still prohibit electric bicycles on an equestrian or hiking and recreational trail. Local rules vary, so the trail sign matters.