Because it’s a Class 1 electric bike, the Tern NBD is usually allowed to ride anywhere a traditional bike can, with no need for a license or registration. Make sure you check local laws, as this can vary on occasion.
Tern NBD E-Bike Review
Written by: Nick Cowie | August 4, 2026 | Time to read: 5 min
Riding an electric bike should be fun for everyone. The Tern NBD is a relaxed, stable, and comfortable e-Bike that anyone can ride. Just step through the frame and be on your way with the help of a smooth Class 1 drive unit.
More about the Author: Nick Cowie
Nick is a writer with seven years of experience in the cycling industry. In his free time, he enjoys swimming, Jiu Jitsu, and spending time outdoors.
Practicality has always been Tern’s strong point. The NBD is the pinnacle of accessibility, making it a practical bike for riders of all kinds. This Class 1 e-Bike is designed to be incredibly stable and inspire confidence in groups like older riders, beginners, and riders with physical limits. It is also a great city bike, designed for performance in urban environments. E-Bikes are for everyone, and the Tern NBD makes sure everyone has a way to ride.
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Table of Contents
Tern NBD Specification Highlights
Made for accessibility and city riding, the Tern NBD comes in two different versions. This gives you the choice between the Bosch Active Line Plus motor and the Performance Line. It also gives you the option of 5-speed or 8-speed Shimano Nexus shifting. Both versions stand out when it comes to comfort and user-friendly features.
Key Specifications:
- Frame: 6061-Aluminium alloy patented design with vertical parking capabilities
- Fork: Cargo rigid, 6061-AL, EFBE approved
- Motor: Bosch Active Line Plus (P8i) or Bosch Performance Line (S5i) mid-drive units
- Motor Torque: 50 Nm (P8i) or 65 Nm (S5i)
- Maximum Assistance: 20 mph / 32 km/h (US Class 1) or 15.5 mph / 25 km/h (UK/EU limits)
- Peak Power: 250 W nominal (depending on exact Bosch motor configuration)
- Battery: Bosch PowerPack 400 Wh (P8i) or 500 Wh (S5i) lithium-ion options (UL 2849 certified)
- Optional Range Extender: DualBattery configurations not standard; single-battery frame optimization
- Estimated Range:Up to 118 km / 74 miles on a single charge
- Tire Clearance: 20" x 2.15" (maximum tire width with integrated mudguards)
- Drivetrain: Shimano Nexus 8-speed internal gear hub (P8i) or Shimano Nexus 5-speed internal hub with Gates Carbon Belt Drive (S5i)
- Weight: 23.4 kg to 23.7 kg (depending on component tier and internal hub setup)
What bike features does the Tern NBD have?
Tern’s bikes are built for functionality. The NBD takes that concept and specializes it for comfort. It is packed full of features that make it more comfortable, stable, and adjustable. The NBD remains smooth in a city environment, doing its best to dampen every road bump and vibration in your path.
- Frame: The NBD utilizes a step-through frame. This makes it easier for riders of all sizes, ages, and physical capabilities to get in the saddle. It also makes it easy to put your feet flat on the ground when stopped. The durable aluminum alloy frame pairs with a rigid aluminum fork that promotes nimble steering.
- Adjustability: The Tern NBD comes with an adjustable setup, allowing riders to find their most comfortable fit. The cockpit geometry can be shifted without the need for tools, letting riders choose between a comfortable upright position and a speed-focused forward position.
- Practicality: The steering column of the NBD is collapsible, making it easy to fit in a car trunk. It also comes with a rear rack that can carry up to 60 lbs and is compatible with child seats. A RideEasy suspension seatpost dampens vibration as you ride, topping off one of the most comfortable city bike designs on the market.
Tern NBD motor and pedal-assist
The electric component of the NBD is a huge reason it is so popular with city and leisure riders. It is a Class 1 electric bike that gives you an extra kick when you need it, but does not overpower the ride feel you love.
- Drive Unit: Depending on the model you choose, your bike will come with either a Bosch Active Line Plus or Performance Line motor. These motors can deliver up to 300% of your pedaling power as assistance, but do it in a smooth way that avoids lurching or unnatural acceleration.
- Integration: A high-visibility front light and a rear safety light are fully integrated into the Tern NBD, drawing power from the main battery. This helps you stay visible to other vehicles and comply with local laws. The integrated PowerPack battery locks vertically behind the seat tube, making it easy to access.
- Smart Tech: The Tern NBD has a multi-sensor system, measuring pedal force to help the motor select a natural level of output. There is also a walk-assist option to help you out when you push your bike. Shift detection technology mitigates pedal stress to avoid internal hub damage. In the cockpit, you will notice a handlebar-mounted display to view outputs and toggle settings.
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Who is the Tern NBD for?
If riding is all about having a nice time or just getting from place to place in your town, this is the bike for you. The NBD isn’t trying to mimic the Tour de France bikes of the world; it is simply set up to give you the most comfortable and capable ride possible. Riders with mobility issues, older riders, and smaller riders can all thrive on this bike. The motor is powerful but never overbearing, making it accessible for these types of riders. The Tern NBD is a city bike for everyone.
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Frequently Asked Questions
Where can I ride my Tern NBD?
Why does the NBD use a step-through frame?
The Tern is designed to get all kinds of people out and riding. Step-through frames are great for those with mobility issues, shorter riders, and staying stable when carrying cargo on its rear rack.
Where can I buy a Tern NBD?
The best place to get a discount on a Tern NBD is Upway. We refurbish used bikes, then sell them for much less than MSRP. If you are looking for a Tern electric bike at a discount, Upway has you covered.
Key Takeaways
- The Tern NBD is a versatile city bike: The Tern NBD’s focus on rider accessibility can distract from its versatility. This bike can commute to work with you, haul cargo or the kids, or go on a leisurely ride through town.
- Bosch drive systems balance your ride: The Tern NBD features a Bosch motor, which includes sensors to continuously measure your pedaling so it can calculate exactly how much power to put out to make you feel smooth.
- Upway buys and sells Tern bikes: If you have a used Tern electric bike and want cash for it, sell it to Upway. We will make an offer within 48 hours and help you ship it to us so you can get paid quickly.
