Electric bikes are becoming increasingly popular with kids and teenagers, but a new nationwide review shows the rules protecting young riders vary dramatically depending on where they live.
The study reviewed e-bike laws in all 50 states and Washington, D.C., focusing on minimum ages, helmet requirements, speed limits and other legal safeguards.
One of its biggest findings: more than 40 states have no general minimum age for riding an e-bike, while 19 states have no e-bike helmet law specifically protecting minors.
Alabama, however, landed in Tier 4 of the study's five-tier system, placing it among states classified as having "stronger protections."
Under Alabama law, e-bikes are divided into three classes. Class 1 and Class 2 bikes stop providing motor assistance at 20 mph, while Class 3 bikes can provide assistance up to 28 mph.

For those faster Class 3 e-bikes, Alabama requires riders to be at least 16 years old. Everyone operating or riding as a passenger on a Class 3 e-bike is also required to wear a properly fitted helmet.
Alabama's existing bicycle safety law separately requires riders and passengers under 16 to wear helmets on public roadways, bicycle paths and other covered public areas.
Unlike some states with even tougher restrictions, Alabama does not require e-bike riders to have a driver's license, registration, title or motor vehicle insurance.
The differences across the country can be significant. According to the study, five states, Arizona, Idaho, Nebraska, Vermont and Wyoming, allow children of any age to legally operate a 28-mph e-bike without a helmet or license. On the other end, states including Connecticut, California, New Jersey, New York and Utah were placed in the study's toughest tier.
The study's authors stress that these tiers are based on the strength of each state's laws, not actual injury rates. They say there currently isn't a federal dataset that reliably tracks child e-bike injuries state by state.
For Alabama parents, the biggest numbers to remember are simple: 16 and 28.
A rider must be at least 16 to operate a Class 3 e-bike capable of assisting up to 28 mph, and helmets are required for everyone riding that class of e-bike.
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