The Rulebook · draft under verification

E-bike law in Montana.

The rules at a glance

Max motor power: —
Top assisted speed: 20 mph
Minimum age: None statewide
Helmet: No statewide helmet requirement
Licence required: No
Registration required: No

The three classes

Class	Assist	Top speed	Throttle
Class 1	Pedal-assist	20 mph	No
Class 2	Throttle + assist	20 mph	Yes
Class 3	Pedal-assist	28 mph	No

Official source

What the statute actually says

WRONG for a 3-class draft: MCA 61-8-102 defines 'electrically assisted bicycle' as a single-tier device whose motor cannot propel a 170-lb rider faster than 20 mph on level pavement, within 'bicycle'. NO Class 1/2/3 and NO wattage cap in statute. Bills to adopt the 3-class model (2023, 2025) both failed. [Source: MCA 61-8-102 (definitions)]. Draft — verify against the current statute before relying on it.

Draft summary under verification — not legal advice. Summaries were ported from Redtail eBikes' rulebook research (pulled 2026-07-03) and are being re-verified against the official sources linked above. State law changes; confirm before you rely on it.