TERN NBD S5i 2023



TERN NBD S5i 2023


Smiles for Miles

Small in size but big on smiles, the NBD is an easy-to-ride, ultra-low step e-bike that's comfy and welcoming—just like your favorite bike should be. Whether you're a seasoned rider or just thinking about your first e-bike, or whether you're doing a quick grocery run or setting off on a new adventure with your kid, the NBD will bring a smile to your face.

Easy to Ride

The NBD is our most accessible bike yet—you just hop on and go. Maneuvering along streets and paths or through playgrounds and parks is child’s play thanks to a low center of gravity. Riders have maximum control, and the ultra-low stepover height makes getting off and then back on again a breeze—even when taking a kiddo.

Easy to Share

The NBD has an adjustable cockpit that only takes seconds to resize, all without tools. Riders 147 – 190 cm tall (4’10” – 6’3”) comfortably fit the NBD, so it comes ready for the whole family to share.

Easy for Everyone

The NBD puts inclusive design at the forefront. Average-sized, able-bodied folks along with people of many different sizes and abilities can share the fun of riding thanks to the NBD’s accommodating geometry and unique frame design.

As Comfortable as Can Be

With wide, ergonomic grips on swept handlebars, an upright riding position, and a multi-adjustable stem, the NBD is our most comfortable bike. Add wide balloon tires and a suspension seatpost to the mix, and most road vibration becomes a thing of the past.

Built to Last

Our philosophy is to keep our bikes on the road for as long as possible, not to create disposable products that are built to fail. We start with intentional design choices that make the bike serviceable and safe—and end up with a reliable vehicle you can use day in, day out.

Easy to Transport

The NBD’s FlatFold feature makes it easy to fit the bike into trains, buses, RVs, and even small-sized cars. Just lower the seatpost, fold down the Physis Handlepost, and the NBD transforms into a low and flat package. No bike racks necessary.

Easy to Store

The NBD parks and rolls vertically, so it’s easy to store safely indoors. Roll it vertically into elevators or conveniently park it just about anywhere in your home or office.

Share the Adventure

Have a kiddo? Take them along for the ride! The specially designed Gaia Rack is built strong and pairs well with many child seats. The NBD’s ultra-low center of gravity makes it much easier to stay in control.

Best of all is getting on the bike. Low, gentle steps are all that’s required to get on or off the NBD, so there’s never any hassle.


SimpleStep Frame Design

The NBD's frame design makes it super easy to get on and off the bike, ride in comfort, and put your feet down when at a red light—even when you’re fully loaded with groceries or carrying your little one.

Low, Low, Low Step

A step-through frame that's both ultra-low (39 cm/15.4") and ultra-long means it takes only one step to get on and go.

Fits Most Sizes and Shapes

The adjustable Andros Stem makes the NBD feel like it was tailor-made. Riders of different sizes can all find their most comfortable position. And when it’s time to share with grandpa, he can re-adjust the fit in seconds.


Ergonomic Cockpit

Swept handlebars and Ergon grips make the NBD just about the most comfortable cockpit you'll find on a bike. The slack seat tube enables all riders—even the smaller in stature—to place their feet on the ground at stops.

RideEasy Suspension Seatpost

The custom short-stack suspension seatpost adjusts to fit riders of different heights, and allows even smaller sized riders to travel without feeling road vibrations.


Air-Cushion Balloon Tires

No special technology needed—air suspension is already built in. The air cushion from Schwalbe’s wide balloon tires give a smooth ride, helping to reduce bumps and other road vibrations when riding.

Feet-Friendly Pedals

The platform of the pedal is extra-large for boosted foot stability. Feet naturally and securely snug into its gentle concave shape. And the pedal has an improved grip for all types of shoes.


Smooth, Powerful Motor

The Bosch e-assist motor system is powerful, efficient, smooth, and supremely quiet. It’s also backed with best-in-class service and support, and a network of thousands of trained dealers in cities around the world.

Bold, Bright, and Easy to Read

The Bosch Intuvia display has all the information you need. It's easy to read on your daytime rides, and it’s brightly lit for when you ride at night. Plus, the entire display is removable and perfectly sized for pockets, so you can carry it with you after you park.

Hassle-Free Belt Drive

Bike chains are great, but often need cleaning and lubing. The NBD S5i comes equipped with a Gates belt drive for durability, low maintenance and a smoother and quieter ride, so you can spend less time cleaning, and more time riding.

Easy-Access Frame Lock

With an Abus frame lock at the top of the rear wheel, most riders can lock up without having to bend down low. And for added simplicity, you’ll need only one key, as the frame lock and battery lock are keyed alike.

What Makes it a S5i?

  • Bosch Performance Line motor provides up to 65 Nm of torque and 300% support
  • Bosch PowerPack 500 powers longer trips, commutes, and journeys
  • Gates belt drive for clean, quiet, maintenance-free operation
  • Shimano® Nexus 5-speed internal hub
  • Magura MT4 hydraulic disc brakes for superior stopping power—even when carrying a passenger and riding fast
  • Ultra-low 39 cm (15.4”) standover height means gentle, low steps are all that’s required to get on and go
  • Ultra-low center of gravity improves balancing and maneuvering when riding with kids through parks and narrow streets
  • Fits riders 147 - 190 cm (4'10" - 6'3")
  • Gaia Rack is certified to carry up to 27 kg (60 lbs) and works with many child seats 
  • Proven safe and reliable: frame and fork have undergone the EFBE Tri-Test to the 140 kg Maximum Gross Vehicle Weight


1 x 5

WEIGHT:23.4 kg (51.6 lb)

GEAR INCHES:34" - 90" (2.75 - 7.22 m)

FOLDING SIZE:38 × 156 × 79 cm (15 × 61.4 × 31.1 in)



DISTANCE: SEATPOST TO HANDLEBAR:45 - 52 cm (17.7 - 20.5 in)

DISTANCE: SADDLE TO PEDAL:70 - 100 cm (27.6 - 39.4 in)

SUGGESTED RIDER HEIGHT:147 - 190 cm (57.9 - 74.8 in)

MAX GROSS VEHICLE WEIGHT:140 kg (308.6 lb)

MAX RIDER WEIGHT:120 kg (264.6 lb)


FRAME:Tern NBD, 6061-AL, Patented design, EFBE Tri-Test approved: 140 kg

FORK:Tern Tarsus, 6061-AL, hydroformed, EFBE approved: 140 kg


HANDLEPOST:Tern Physis 3D, 3D forged, 5 patented technologies, 12°, 350 mm

STEM:Tern Andros, adjustable, forged construction, patented technology

HEADSET:Tern Flux by FSA, cartridge bearings, Physis integrated

HANDLEBAR:Tern Sweep, 6061-AL, Tern Andros adapted


SADDLE:Tern Upright by Velo

SEATPOST:Tern RideEasy Suspension, 34.9 mm, Air cartridge, Preload adjustable



FRONT BRAKE:Magura MT4, hydraulic disc

REAR BRAKE:Magura MT4, hydraulic disc

BRAKE LEVERS:Magura, hydraulic

BRAKE CABLE & HOUSING:Magura, hydraulic


FRONT HUB:Shimano disc

REAR HUB:Shimano Nexus 5

SPOKES AND NIPPLES:Stainless steel

RIMS:Kinetix Comp, for disc

TIRES:Schwalbe Big Apple, Performance Line, 55-406, puncture protection, Reflex


SHIFTER(S):Shimano 5 spd.

CRANKSET:Tern NBD custom, Gates CDX CNC machined beltring

CASSETTE/FREEWHEEL:Gates CDX, precision CNC machined cog

CHAIN:Gates Carbon Drive CDX belt

PEDALS:MKS Platform, Tern custom design



MOTOR:Bosch Performance, 300% Assist, 65 Nm Torque, max speed 25 kph (EU); max speed 20 mph (US)

BATTERY:Bosch PowerPack 500

DISPLAY:Bosch Intuvia, 4 mode selectable, walk assist

RANGE:51-118 km (32-74 mi)

CHARGER:Bosch Standard Charger




CHAINGUARD:Tern Custom, full chain cover

KICKSTAND:Ursus, rear mount


FRONT LIGHT:Tern Valo Direct, 190 lumens


FENDERS:SplashGuard, stainless hardware

RACK(S):Gaia Rack, 27 kg capacity, Vertical Parking

FRAME LOCK:ABUS, keyed-alike with Bosch battery

*Note: These are our standard model specifications. The bike's weight and folded dimension may not include racks and fenders. We do our best to ensure that the specifications listed here accurately reflect the exact parts found on our production bikes. However, component changes do occur for various reasons and there may be brief delays on site updates. We reserve the right to make component changes without prior notification, which may cause discrepancies with the information listed on the web.

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