E-Bike Injuries Are Rising Fast Nationwide, Here’s Why

Electric bikes have transformed the way Arizonans get around. Whether you’re commuting through the city or cruising a multi-use trail, e-bikes offer a compelling mix of convenience, affordability, and fun. But as ridership has surged, so has something far less welcome: a rapid and alarming rise in serious injuries and fires that regulators are only beginning to address.

The Number of E-Bike Injuries Tells a Troubling Story

The growth in e-bike injuries has been staggering. Research from Columbia University found that injury rates surged 293 percent between 2019 and 2022 alone. A University of California study tracking emergency room data found e-bike injuries climbed from roughly 750 in 2017 to more than 23,000 by 2022. And head trauma from e-bike accidents increased 49-fold nationally over that same five-year period — alarming enough to prompt a coordinated safety response from three major surgical associations in 2024.

Two Factors That Drive the Risk of E-Bikes

A Class 3 e-bike can reach 28 miles per hour with pedal assist. At those speeds, stopping distances increase dramatically, reaction time becomes critical, and the consequences of a collision are far more severe than on a traditional bike. Yet most riders share the same infrastructure as pedestrians and conventional cyclists, often without any additional training or licensing. 

Research also shows that the median age of injured e-bike riders is significantly higher than that of traditional cyclists, suggesting many adults overestimate their ability to handle a vehicle moving at those speeds.

Then there’s the battery risk. Lithium-ion batteries — particularly cheap or improperly charged ones — can ignite rapidly and burn at extreme temperatures. In New York City alone, e-bike batteries caused 267 fires, 150 injuries, and 18 deaths in 2023. Arizona’s intense heat adds an additional concern: high temperatures can accelerate battery degradation, increasing the risk of thermal failure in bikes stored or charged in hot garages and outdoor spaces.

What Arizona E-Bike Laws Actually Require

State e-bike laws vary enormously from state to state, and in many places, they remain a patchwork of inconsistent rules that are difficult to enforce. Age restrictions, helmet requirements, speed limits, and where e-bikes are permitted to operate differ depending on where you live, and enforcement is rare.

Arizona classifies e-bikes into three categories under ARS § 28-819:

  • Class 1: Pedal-assist only; motor stops at 20 mph
  • Class 2: Throttle-controlled; motor stops at 20 mph
  • Class 3: Pedal-assist (some with throttle); motor stops at 28 mph; speedometer required

No driver’s license, registration, or insurance is required to ride any class of e-bike in Arizona. There is no statewide helmet law for riders of any age, though safety experts strongly recommend helmets on every ride. Arizona’s DUI laws do apply to e-bike riders, which means operating one while impaired is illegal.

Class 3 e-bikes face more restrictions on where they can be ridden. They are generally prohibited on bicycle and multi-use paths unless the path runs adjacent to a roadway or a local authority has explicitly permitted access. Local jurisdictions can — and do — layer additional rules on top of state law, so it’s always worth checking regulations before riding somewhere new.

Ride Smart Habits That Help Reduce Your Risk

E-bikes aren’t going away, and that’s not a bad thing. But riding one safely means treating it like the motorized vehicle it actually is. A few consistent habits can help make a real difference:

  1. Always wear a helmet, even on short rides.
  2. Follow traffic laws and use designated bike lanes where available.
  3. Use front and rear lights at all times.
  4. Never modify your bike to exceed its speed class rating.
  5. Charge your battery with the manufacturer-approved charger and never leave it unattended overnight.
  6. Don’t ride under the influence, as Arizona DUI laws apply.
  7. Most safety experts recommend a minimum riding age of 16.

Injured in an E-Bike Accident in Arizona?

E-bike vehicles offer genuine benefits and are a meaningful part of a greener transportation future. But they are powerful vehicles that deserve the same serious attention we give to any other motorized form of transportation. If you or someone you love has been injured in an e-bike accident, contact us for a free consultation with an experienced personal injury lawyer at Bache Lynch Goldsmith & Mendoza.