Electric mountain bikes may still be contentious on the trails, but there's no good reason why you shouldn't get a commuter with a little extra oomph.聽
Stromer ST1 X ($4,999)

Best For: Geeks with a need for speed.
The Test: The epitomizes integra颅tion. The futuristic aluminum chassis, complete with through-axles, hides a high-capacity 618-watt-hour battery in the chunky down tube, a proprietary 500-watt motor鈥攁mong the most powerful on the market鈥攊n the聽rear hub, and an LCD touchscreen in the top聽tube that displays battery level and assist power. With the accompanying app (Android and iOS), you can tune the engine perfor颅mance to make it accelerate faster or maxi颅mize efficiency. You can also lock out the brakes, so it can鈥檛 be rolled away by thieves, and track the bike via the built-in GPS, should 聽it go missing anyway. Of course, all that tech颅nology鈥攑lus beefy fenders and a bombproof rack鈥攃omes at a price: the ST1 X is the heaviest option here, and parking it can feel like muscling a Harley.
The Verdict: With a range of up to 75 miles, this is a top-shelf daily driver for tech颅nophiles. 63 lbs
Faraday Cortland ($3,499)

Best For: Bike snobs.
The Fest: We love that Faraday managed to combine the chic simplicity of a step-through Dutch roadster with the technological advantages of a pedal-assist motor. The key is the diminutive 306-watt-hour battery behind the seat and 250-watt front hub 颅motor, which together preserve aesthetics while delivering a surprising amount of kick. That scaled-down electrical system also keeps the weight low, making this fun to ride even with the motor off (a good thing, since the range is only 20 miles). was obviously designed by cyclists, as the Gates belt drive, eight-speed Shimano Alfine drivetrain, and Continental Contact tires are parts we鈥檇 hope for on any bike, pedal-assist or not. Our only niggle: the taillight is so low that the rear wheel almost blocks it from view. On the other hand, the double kickstand is the best here.
The Verdict: The future of e-bikes鈥攂eautiful, lightweight, and fun. 42 lbs
Juiced CrossCurrent聽($1,499)

Best For: True utilitarians.
The Test: that quality e-bikes don鈥檛 have to be a pain in your wallet. It鈥檚 not the sexiest ride, with聽the 374-watt-hour battery tacked onto the down tube like a growth, but the 340-watt motor in the rear hub offered plenty of torque. The standard battery setup is rated at 25 miles on a charge; however, the聽lowest power settings added very little assis颅tance, so we opted for higher settings and got a little more than half that range. We were聽most impressed by the rigid version of the bike, called the CrossCurrent Air, which 颅ditches the suspension fork (and three pounds) and switches up the electronics, which reduces the price to $1,095.
The Verdict: An e-bike for everyone.聽51.5 lb