sixblues EB3S 26" Electric Mountain Bike

UL 2849 covers the complete e-bike electrical system — battery, motor, controller and charger together — and UL 2271 covers the battery pack. They are the two standards US rules name. New York City's Local Law 39 of 2023 bans the sale in the city of e-bikes and batteries not certified to one of them, California's SB 1271 requires certification for e-bikes sold there from 1 January 2026, and a growing number of apartment buildings ask to see a certificate before they allow a battery to charge indoors.

What makes this listing's claim worth something is the specificity. "UL certified" on its own is a marketing phrase; naming the standard and the laboratory (SGS) is the version you can ask the seller to back with a certificate. Under $300 the usual situation is the one on our HopCycle EB3L review, where neither standard is documented at all, or a vague "certified battery" line. The Funhang EB-M1 at $219.99 is the other budget bike we cover that documents both, with a smaller 374 Wh battery. If certification decides your purchase, ask sixblues for the certificate number before you order; a named lab means one exists to send.

The listing gives 540 Wh and 15 Ah but never states the voltage; 540 divided by 15 is 36 V, which is consistent with the rest of the sheet. A 26-inch hardtail on standard tires is far more efficient than a fat-tire bike, drawing roughly 15-22 Wh per mile:

• 540 Wh / 22 Wh per mile = 25 miles (throttle-heavy riding, hills)
• 540 Wh / 18 Wh per mile = 30 miles (our planning figure)
• 540 Wh / 15 Wh per mile = 36 miles (light rider, low assist, flat ground)
• 540 Wh / 80 miles = 6.75 Wh per mile, which is what the "up to 80 miles" claim requires

Under 7 Wh per mile is what a light road bike with a tiny motor manages, not a 26-inch mountain bike with a rider aboard, so the 80-mile claim is not credible. Thirty miles is still a useful commuting range at this price, and the pack is removable for indoor charging.

The listing states a 20 mph top speed and a pure-electric mode, which is the Class 2 shape: Class 2 allows a throttle up to 20 mph and is treated as a bicycle in nearly every state, including the seven jurisdictions that ban Class 3 (DC, Kentucky, Massachusetts, Montana, North Carolina, Pennsylvania and South Carolina). The one gap is the motor rating. The federal low-speed electric bicycle definition in 15 U.S.C. §2085 is written around 750 W rated, and sixblues publishes only a 1500 W peak figure. Peak is the brief maximum a motor draws when accelerating; most hubs sold this way are rated somewhere between 500 and 750 W, but the listing does not say, so we cannot confirm it from paperwork. On speed alone it is the most legally straightforward bike in this price bracket. New Jersey and Hawaii require registration for e-bikes; check your state for path and sidewalk rules.

Five riding modes cover pure electric, pedal assist, cruise control, pedal only and walk assist, and the seven-speed Shimano drivetrain gives you a usable range of gears for pedalling with the motor off. Mechanical disc brakes front and rear are standard at this price and need occasional cable adjustment as the pads wear. The display shows speed, mode, mileage and remaining charge, and a USB port charges a phone on the move. The listing says it arrives 90% pre-assembled with a 12-month warranty.

What is missing is a bike weight and a payload limit. Comparable 26-inch hardtails weigh 50-60 lb and carry 260-330 lb; if you are near the top of that range, ask before buying.

Buy this if you want a conventional 26-inch e-bike under $300 with documented UL 2849 and UL 2271 certification and a 20 mph top speed, for paved and light gravel commuting. Skip it if you need a published payload rating, hydraulic brakes, or a torque sensor; or if you mostly ride soft ground, where a fat-tire bike such as the ESKUTE V300 suits better.