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Vektron S10 Gen 2 Folding Bosch eBike

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All around the world, the way we get from A to B is changing. With the world on the cusp of auto-mobility, ride sharing, and the mainstream arrival of electric vehicles, it’s an exciting moment for transportation. To help drive this force of change, we developed the world’s most compact Bosch-driven electric bike. The Tern Vektron takes everything great about folding bikes—multi-modal commuting, portability for travel and storage—and accelerates it.


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Ride it, Fold it, Go Further

The Vektron is a best-in-class electric bike that folds in 10 seconds to go on trains, in cars, and under desks. Shorten distances and flatten the hills on your commute, or put a couple of Vektrons in the trunk of your car on your next trip, so you can explore further.

Tern Vektron S10 Gen 2 Features:

  • Bosch Active Line Plus electric drivetrain for more torque and smoother acceleration
  • Updated frame design, with a reclining battery for a lower center of gravity and better ride
  • Integrated Atlas Rack works seamlessly with Thule Yepp Maxi and Nexxt Maxi child seats—no adapters needed
  • Resizes in seconds to fit riders 147 – 195 cm (4’10” – 6’5”) so a single bike can be shared by the family
  • Fits easily on buses, subways and taxis for electric multi-modal commuting
  • Stores under a desk for convenient theft protection; no need to bring a heavy lock

Vektron S10 Video Review:

Note: this is a review of the Vektron S10 Gen 1.  There are a few differences with the new Gen 2 and we hope to have a new video available soon.

 

Best in Class

In test after test, the Vektron is called the best folding ebike on the market. The updated Vektron gets even better with improved geometry, Bosch’s newest and virtually silent motor, and a burly, extended rack. With a Vektron, a lot of your car trips will start turning into bike trips.

Ready to Roll

Once you fold your Vektron, it’s easy to roll it around. The new frame design also lets you keep the bike in vertical position when folded, so stopping and going is easier than ever.

 

Rides Better

There are other folding electric bikes but none ride better. The Vektron is stiff and stable for a truly solid ride - even when fully loaded. Take a test ride and feel the difference.

Takes You Further

Take your Vektron on a train or bus to cover those extra-long commutes, or to complete the first and last leg of your commute faster. Ride to the station, hop on, hop off, and keep riding.

One Size Fits All

The Vektron has a low-step frame design and resizes in seconds—no tools required—to fit riders between 145 and 195 cm (4’10” – 6’5”), so you can share the bike with anyone in your family.

 

Kiddie Compatible

School runs have never been more fun! The Vektron is designed to fit a Thule Yepp Maxi or a Nexxt Maxi seat—no adapters needed.*

* Vektron P9 and D8 must be fitted with a Cargo Rack in order to accommodate a Yepp seat.

 

Tern Vektron S10 (Gen 2) Specifications:

SPECIFICATIONS

 

GENERAL INFO
COLOR: 
WHEEL SIZE:20" wheels
SPEEDS: 1 x 10
WEIGHT: 22.1 kg (48.6 lb)
FOLDING SIZE: 41 x 86 x 68 cm (16.1" x 33.9" x 26.8")
FOLDING TIME: 10 sec
FRAME SIZES: One size
GEAR INCHES: 30" - 97" (2.36 - 7.72 m)
DISTANCE:
SEATPOST TO HANDLEBAR:Min: 620 mm (24.4") Max: 690 mm (27.2")
DISTANCE: SADDLE TO PEDAL: Min: 670 mm (26.4") Max: 1100 mm (43.3")
SUGGESTED RIDER HEIGHT: 147 - 195 cm (4'10" - 6'5")
MAX LOAD WEIGHT: 105 kg (230 lb)
 
FRAME
FRAME: Vektron G2 Frame
FORK: Tern Tarsus, 6061-Al, hydroformed
 
COCKPIT
HANDLEPOST: Tern Physis 3D, 3D forged, 5 patented technologies
STEM: Tern Andros, adjustable, forged construction, patented technology
HEADSET: Flux Pro, angular contact bearings, Physis integrated
HANDLEBAR: Kinetix Comp, double-butted 6061-Al
GRIPS/BAR TAPE: Ergon GP10
SADDLE: Tern Porter+, patented GripPad design, PrimeGel padding
SEATPOST: Tern Telescope, 34.9 mm, Lite 2014-AL
SEATPOST CLAMP: Oversize, 6061-AL, 2pc

BRAKES:
FRONT BRAKE:Magura MT4, hydraulic disc
REAR BRAKE: Magura MT4, hydraulic disc
BRAKE LEVERS: Magura, hydraulic disc
BRAKE CABLE & HOUSING: Magura, hydraulic disc

WHEELS 
FRONT HUB:Novatec, sealed cartridge bearing, disc
REAR HUB: Novatec, sealed cartridge bearing, disc
SPOKES AND NIPPLES: Stainless, double-butted
RIMS: Kinetix Comp, for disc
TIRES: Schwalbe Big Apple, Performance Line, 55-406, puncture protection, Reflex

TRANSMISSION 
SHIFTER(S): Shimano Deore, 1 x 10 spd
REAR DERAILLEUR: Shimano Deore Shadow+
CRANKSET: Vektron custom, forged 6061-AL crankarm
CASSETTE/FREEWHEEL: Shimano 11-36T, 10 spd
BOTTOM BRACKET: Motor integrated
CHAIN: 10 spd, DHT for eBike, GST corrosion resistant coating
PEDALS: MKS EZY
SHIFTER CABLE & HOUSING: Jagwire LEX-SL, slick treatment, alloy ferrules

E-SYSTEM MOTOR:
Bosch Active Line Plus, 36 V/250 W, max speed 25 kph (EU); max speed 20 mph (US), max torque 50 Nm
BATTERY: Bosch PowerPack 400 Wh
DISPLAY: Bosch Purion, 4 mode selectable, walk assist
RANGE: 400 Wh: 50-100 km (31-62 mi)

BELLS & WHISTLES
BELL: Aluminum
CHAINGUARD: SKS Chainblade
KICKSTAND: URSUS MOOI, rear mount
CLIP SYSTEM: Magnetix 2.0
LUGGAGE SOCKET: Yes
FRONT LIGHT: Tern Valo Direct, integrated, 41 lux/150 lumens
REAR LIGHT: Herrmans H-Trace, for eBike
FENDERS: SKS, stainless hardware
RACK(S): Atlas Rack, integrated 8 point mounting

 Tern Vekton S10 Gen 2 Technology:

OCL+™ Frame Joint

ROBUST FOLDING TECHNOLOGY

A heavy-duty update to our iconic OCL frame hinge, the OCL+ is built to exceed ISO 4210 and EN 15194 testing requirements. Leveraging the hinge design of the long-tail Tern Cargo Node, the OCL+ features a single-shaft design, advanced welding techniques, and robust gussets, so it stays stiff and strong during even the fastest commutes.
 
Stronger by Design
Making the hinge taller and moving the pivoting surfaces outward from the center axis more than doubles overall strength and stiffness. It’s a difference you’ll feel from your very first ride.
Smooth Operation
The patented design puts four igus® bearings between the aluminum and stainless steel moving parts so the folding action is always smooth and friction-free.
Interlocking Joint
The front and rear joint surfaces lock together to eliminate torsional movement.
 
Easy to Use
Large rounded surfaces on the lever and joint bodies are easy on your hands and allow good leverage for easy operation.
Doubly Safe
Close the lever and the AutoLok™ automatically locks in place for extra, easy security.
Floating Point Technology
Patented technology allows the lever to fold flat and brace against the joint for protection in transit.
 
Serviceable
Good things are built to last and that’s why the OCL+ Joint is designed to be dealer serviceable. We keep every part in stock and if your bearings ever wear out, your dealer can replace them in a few minutes.
Precision-Machined
A machining tolerance of only 50 microns ensures a tight fit and eliminates looseness and rattling.
Stainless Steel Hardware
Cold-worked stainless delivers the durability and reliability needed for daily riding in all weather conditions.
 
 
 
 
 

Updated Vektron Frame

RE-ENGINEERED FOR A BETTER RIDE

With a re-worked frame and frame geometry, the updated Vektron is now even better. The cockpit is longer for improved comfort for taller riders. The frame has been designed with additional forged and machined elements for additional strength without extra weight. The battery now reclines backwards, keeping the center of gravity as low as possible for superior handling. And the new design allows the Vektron to stand up vertically when folded, making it even easier to roll around.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

DoubleTruss™ Technology

STIFFER BY DESIGN

The rear half of Tern frames use a patented 3D structure we call DoubleTruss to build in extra stiffness. It helps resist torsional forces so our bikes flex less. That means increased stiffness and much better power transfer from the pedals to the rear wheel. The proof’s in the ride.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Quadric™ Dropouts

THE USER-CENTERED DROPOUT

Dropouts are often overlooked, but a good dropout goes a long way. Our Quadric dropout is built taller, so your disc brakes are protected inside the frame. The design makes the eyelets for mudguards, racks, and our clip system more user-friendly and accessible than ever before. We even included a mount for a sturdy rear kickstand.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Tarsus™ Fork

HYDROFORM MEETS FUNCTION

Utilizing a single hydroformed tube mated to a precision-machined steerer, the Tarsus delivers superior strength in a shape that matches the sophisticated lines of the Verge and Eclipse frames.
 
Hydroformed Tubing
The process of hydroforming aligns the grain structure and strengthens the aluminum material. It also minimizes welding in the most highly stressed area of the fork.
Internal Wire Routing
If you decide to equip your Tarsus with a dynamo hub, it’s ready for internal cable routing, keeping the profile of your bike clean.
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Physis™ 3D Handlepost

THE NEW BENCHMARK

Five patented technologies and unique manufacturing technology add up to the strongest, stiffest folding handlepost available. The Physis uses a special manufacturing process called 3D forging, which forms the post from a single piece of aluminum, eliminating all welds.
 
No Flex
To eliminate flex, the Physis uses a massive joint knuckle and a post that gradually tapers from thick at the base to thin. Moreover, it has 150% more clamping height between the fork steerer and the handlepost than common designs.
Flux Technology
The base of the Physis is machined so it functions as the upper race of the headset. This patented direct integration contributes to the incredible stiffness of the design.
Interlocking Halves
Joint surfaces lock together to improve torsional stiffness. We've fine-tuned the shape to virtually eliminate squeaks.
 
Redundant Double Bolts
Two bolts clamp the Physis to the fork steerer for improved safety.
igus® Bearings
The patented design puts sliding bearings between the moving parts so the folding action is always smooth and friction-free.
Large, Smooth Lever
Large rounded surfaces are easy on your hands and provide good leverage for easy operation.
 
AutoLok Technology
Close the lever and it automatically locks in place, for extra, easy security—using an aluminum pin.
Floating Point Technology
Patented technology allows the lever to fold flat and brace against the joint for protection in transit.
SpringLock Technology
Patented SpringLock technology holds the adjustment rod firmly in place so the locking lever is always properly tensioned and can never vibrate loose.
 
Serviceable
Good things are built to last and that’s why the Physis is designed to be fully dealer serviceable. We keep every part in stock and replacing the bearings can be done in minutes.
TriSeal Design
Three rubber seals keep weather out and the headset bearings functioning smoothly.
Precision-Machined
A machining tolerance of only 50 microns ensures a tight fit and eliminates looseness and rattling.
 

Andros™ Stem

ADJUST TO FIT

The Andros is our patented adjustable stem that lets you set your handlebars where you want—no tools, no fuss. In just seconds, you can set your riding position to long and low in a tough headwind, or upright and comfy for riding around town. You decide how you want to ride and the Andros makes your bike fit.
 
Quick Release
Patented quick-release, tool-free design is easy to operate.
TwinStem Design
The Andros design uses two stems, spaced widely apart for excellent torsional stiffness.
Fits the Family
Accommodates riders of all sizes so one bike can be shared by multiple riders.
 
Forged Construction
The patented design is FEA optimized and fully forged for maximum strength with minimum weight.
Built to Last
Stainless hardware and brass bushings for long-term durability.
 
 
 
 
 
 
 
 
 
 

Porter+™ Saddle

ROLL WITH CONTROL

We reengineered the underside of the age-old bike saddle into a comfortable grip for transporting your folded bike. Up top, the dual-density construction and gel cushioning will keep you comfortable on the road, and the impeccably finished vacuum construction makes the saddle waterproof and easy to clean. Down below, the GripPad™ lets you roll your folded bike with comfortable confidence.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Telescopic Seatpost™

LONGER SEATPOST. SMALLER FOLD.

This seatpost is perfect for tall riders or anyone who likes a compact fold. It extends 90 mm longer than our stock seatpost, but thanks to its unique design, it’s 120 mm shorter when retracted. It features a dual-bolt head design for precise saddle adjustment, and an inner post diameter of 27.2 mm, so you can customize it with other posts.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Magura MT4 Hydraulic Disc Brakes

FULL STOP

Hydraulic disc brakes give you excellent stopping power, working effortlessly even in rain, snow, or mud. All it takes is the gentle pull of just two fingers. With mineral oil-based brake fluid that is gentler on the environment than most hydraulic brake fluids, and Magura's Easy Bleed Technology, your Vektron is ready for a safer ride.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Schwalbe Big Apple Tires

CUSH FOR YOUR TUSH

Big Apples are special because they’re fast rolling AND super comfy. Sounds hard to believe but you’ll just have to take them for a ride to become a believer.
 
Faster Rolling
Wide tires roll better than skinny tires at the same tire pressure. Yes, it’s true! Big Apples are extra special because they use a light and flexible tread and sidewall for extra low rolling resistance.
Wide for Comfort
Super-wide Big Apple tires are like 2" of super-efficient suspension. They roll smoothly over drainage grates, train tracks and potholes with little complaint.
Puncture Protection
Big Apples feature a Kevlar belt to protect from punctures.
 
Reflex for Safety
Each Big Apple tire features a reflective stripe so you are immediately, and obviously, visible to cars approaching from the side.
 
 
 
 
 
 
 
 
 
 
 

Shimano Deore Shadow+ Derailleur

NO MORE CHAIN DROP

Originally developed for mountain bikes—for extra durability and to avoid catching on trail debris—the Shadow+ derailleur is streamlined and incredibly resilient, which comes in handy when you need to transport your folded bike. Whether your bike is bagged on the subway or riding in the trunk of your car, everything is neatly tucked away. And with a clutch to adjust the chain tension, you can now ride on bumpy city roads without worrying about chain drops.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Bosch Active Line Plus

CAREFREE RIDING

With a little more torque for smoother acceleration, the Bosch Active Line Plus drive unit can take you up to 25 km per hour (20 mph in the U.S.) and operates dependably—day in and day out. The new generation of the Active Line Plus is also 20% lighter and 25% smaller than the previous one, maintaining its excellent performance and low-levels of vibration while delivering an even quieter ride with less pedal resistance.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Bosch PowerPack Battery

FEATHER-LIGHT POWERHOUSE

This impressive high-energy, high-power cell clips on and off your bike. The best-in-class design charges fast—from zero—in only 2.5 to 3.5 hours, and lets you ride longer and further between charges. You’ll be impressed by its long lifespan, light weight, and ease of charging. PowerPacks are available in 300/400/500 Wh variants, so you can forget about range anxiety.
 
Light Weight
At just 5.5 lb, the weight is practically negligible during riding. The PowerPack is an ingenious balance of performance, size, and weight.
More Mileage
Ride nice and long between charges thanks to best-in-class energy density.
Fast Charging
High-power density allows the PowerPack to charge to 50% in just 1.5 hours and fully in just 2.5 – 3.5 hours* (*Requires optional 4A Bosch Standard Charger).
 
Long Lifespan
PowerPacks are designed for many tours, miles, and years of service. The integrated Battery Management System protects the battery from overcharging, undervoltage, overheating, and short circuiting.
Ergonomic
The ergonomically designed handle makes it easy to insert and remove the PowerPack for charging. Charge it easily on or off the bike.
 
 
 
 
 
 
 
 
 
 

Bosch Purion Control Panel

COMPACT CONTROL CENTER

The on-board computer lets you switch between five different riding modes, and feeds you handy information like speed, battery level, and distance. It optimizes shifting actions and constantly updates you on the remaining range, just like a typical German car. Best of all, it’s now more compact and robust than ever.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Magnetix™ 2.0

KEEP IT TOGETHER

The Magnetix 2.0 uses powerful magnets to keep your bike folded for situations like carrying your bike up and down stairs. With a pull force 10-15 Kgf, the Magnetix 2.0 will keep your bike folded even when being jostled and moved about.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Luggage Socket™

CARRY MORE STUFF

Fix the Tern Luggage Truss to the Luggage Socket and you can plug in your choice of front luggage: rack, basket, or bag. If it’s KlickFix compatible, it’ll work.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Valo™ Direct Light

IMMEDIATE ILLUMINATION

Our 41 lux, 150 lumen Valo Direct lights up your ride without adding the drag or weight of a dynamo. It’s engineered to sit inside the handlebar stem, where it’s safe from knocks, bumps, and theft. That means it’s protected while folding, and optimally positioned to give you the most light.
 
Herrmann’s Expertise
We designed the Valo with Herrmans, the Finnish lighting experts who have a side business making lights for massive earth tunneling machines. No surprise then that the Valo is ready for all weather conditions: it’s made from cold-resistant ABS with built-in water management channels.
Extra Bright
The Valo puts out 41 lux of light, 4x brighter than the European requirement for bicycle lighting. That means you get a bright, wide beam of light that makes cycling at night safe and reassuring.
Clarity™ Optics
The Valo has a carefully shaped mirror that optimizes the beam pattern for cycling. It is wide, so you can see potential obstacles or hazards on the side of the road. It is even, without hotspots, so your night vision is not compromised. And it is clipped at the top of the beam pattern so you don’t blind oncoming cyclists or motorists.
 
Side Lighting
The Valo has light channels on each side so that you are visible to cars approaching from the sides. For additional safety, the Valo has two additional LED’s on each side, which light up when you’re stopped at a traffic light.
Visor
The Valo protects your sensitive night vision with a small visor that blocks light from shining back into your eyes.
Patented CryoCore™ Design
LED lights need to run cool to work optimally. If they run too hot over a period of time, they gradually lose brightness. Most LED lights have a tiny button sized heat sink that is used to dissipate heat. Our patented design connects the Valo to the handlebar so the entire bar is used as a massive heat sink.
 
 
 
 
 
 
 
 
 

720° Visibility

SEE AND BE SEEN

You need to be safe when you’re out on the road. That’s why we’ve designed our hard-core commuter bikes with 720° Visibility: 360° of active lighting and 360° of reflectivity.
 
360° Active Lighting
Specially designed lights allow you to be seen from all angles when it’s dark out. Accidents often occur at 90° angles at an intersection so active side lighting is especially important.
360° Reflectivity
Bright car headlights can overwhelm the active lights on a bike and this is why reflectivity is important: the brighter a car’s headlights, the brighter the reflective patches shining back at the driver. Bikes with 360° Reflectivity are visible from every angle to oncoming cars.
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Atlas Rack

AN ULTRA-ROBUST RACK WITH GSDNA

With structural cues from the heavy-duty Tern GSD, the new Atlas Rack has been massively strengthened and increased in size. This reduces flex for more secure handling when the bike is loaded. Riding with your little one? Add a Thule Yepp Maxi or Nexxt Maxi child seat—no adapters needed. The Atlas Rack is also KLICKfix-compatible, and can hold panniers of different sizes—including the Bucketload Pannier, which was designed to fit every configuration of the Vektron.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

Specifications

Specifications

Brand Tern
Motor Manufacturer Bosch

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