Vektron P9

Vektron P9

The Accelerator

The Vektron is a best-in-class electric bike that folds in 10 seconds to go on trains, in cars, and under desks. With an electric drivetrain, 20” wheel bikes are just as fast as 700c. That means riders can enjoy all the benefits of small wheels—compact size, low center of gravity, quick acceleration, maneuverable handling, and plenty of cargo space—with big wheel speed.

The Vektron P9 comes equipped with a nine-speed Sora drivetrain, for all the gearing you need in the city. With the Tern Cargo Rack, Valo Direct light, and full front and rear fenders, it’s purpose-built for all-season commuting.

  • Bafang M400 Drive System—250 watts of responsive and dependable power
  • Shimano Sora derailleur for precise and reliable shifting
  • Hydraulic disc brakes for all-weather stopping power
  • Tern Valo Direct light, with 150 lumens of power, for 24-hour visibility
  • 400 Wh battery for a range of up to 90 km
  • Resizes in seconds to fit riders from 147 to 195 cm (4’10” – 6’5”)
  • Tern Cargo Rack™ for hauling your gear
Photo may show optional accessories.
Dark Red
20" wheels


Product Reviews


The Tern Vektron is suitable for taking children and transporting groceries. Folded, it is as big as a long-distance suitcase and can be taken on the ICE train.


Nous voilà séduits par les performances du moteur central Bafang Max Drive.

Sur le plan du pilotage le Vektron p9 procure beaucoup de Plaisir. Son coté compact lui permet de se faufiler aisément dans le flot de la circulation tout en restant bien stable grace à un centre de gravité bas. Quant à la position de pilotage, elle est confortable et ne procure pas la moindre tension musculaire.

[We are seduced by the performance of the mid-motor Bafang Max Drive.

In terms of riding the Vektron p9 provides a lot of fun. Its compact size allows it to sneak easily into the traffic flow while remaining stable thanks to a low center of gravity. As for the steering position, it is comfortable and does not provide the slightest muscle tension.]

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62 E-Bikes in 8 Kategorien hat die Elektrobike-Test-Crew auf der Straße getestet (…). Alle Testsieger aus dem Elektrobike-Test im Überblick:
Kompakt-E-Bike: Tern Vektron P9

[The Elektrobike Test Crew has tested 62 ebikes in 8 categories (…). All test winners at a glance:
Best compact ebike: Tern Vektron P9]

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Auf seinen kleinen Rädern rollt das Tern Vektron sehr wendig, aber nicht nervös. […] Für Komfort sorgen die voluminösen Reifen und die ergonomische Sattel-Lenker-Kombination. […] Das Vektron sichert sich den Kompakt-Testsieg.

[On its small wheels, the Tern Vektron is agile, but not nervous. […] Comfort is ensured by the voluminous tires and an ergonomic cockpit. […] The Vektron wins our the compact category test.]

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Egal für welche Motorvariante man sich entscheiden mag, handelt es sich beim Vektron um ein erfreulich gut gemachtes E-Bike, welches als Besonderheiten hochvariable Einstellmöglichkeiten für Lenker und Sattel sowie einen Faltmechanismus bietet, der raumoptimiertes Verstauen und den einfachen Transport erlaubt.

[No matter which variant of engine you choose, the Vektron is a pleasingly well-made e-bike that offers highly variable adjustment options for the handlebar and saddle as well as a folding mechanism that allows space-optimized stowage and easy transport.]

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Das Vektron P9 ist sehr variabel einsetzbar – ein wirklich praktisches Rad zum attraktiven Preis.

[The Vektron P9 is very versatile – a really practical bike at an attractive price point.]

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Das Tern Vektron P9 regt nicht nur Verkehrsexperten zum Träumen an, es funktioniert auch richtig gut.

[Not only is the Vektron P9 an urban-planner’s dream, it also rides really well.]

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With a fleet of 100 Tern Vektron e-bikes spread across 13 ships, over 2,200 Grand Circle Cruise Line and OAT customers have had enjoyed the e-bike tour while on holiday.
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Tern per i possessori di eBike è anche garanzia di sicurezza, dato che la bici pieghevole è sempre al seguito e non necessita di essere lasciata in strada.

[Tern for e-bike owners is also a guarantee of safety since the folding bike is always with you and doesn’t have to left on the street.]

. . . has plenty of cargo space, and there’s just this stiffness feel . . . a very solid feel. . . .

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General Info
Dark Red
Wheel Size:
20" wheels
1 x 9

22.6 kg (49.8 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:
33" - 97" (2.65 - 7.72 m)
Distance: Seatpost to Handlebar:
Min. 620 mm (24.4") Max: 690 mm (27.2")
Distance: Saddle to Pedal:
Min. 680 mm (26.8") Max: 1110 mm (43.7")
Suggested Rider Height:
147 - 195 cm (4'10" - 6'5")
Max Load Weight:
105 kg (230 lb)
Tern Vektron, hydroformed aluminum, OCL+ joint, 3 patented technologies
Tern Tarsus, 6061-Al, hydroformed
Tern Physis 3D (G2), 3D forged, 5 patented technologies, 12°, 320 mm
Tern Andros (G2), adjustable, forged construction, patented technology
Tern Flux, cartridge bearings, Physis integrated
Flat bar, 6061-Al, Tern Andros adapted
Grips/Bar Tape:
BioLogic Arx
Tern Porter, patented GripPad design
Tern Telescope, 34.9 mm, Lite 2014-AL
Seatpost Clamp:
Oversize, 6061-Al, 2 pc
Front Brake:
Shimano, hydraulic disc
Rear Brake:
Shimano, hydraulic disc
Brake Levers:
Shimano, hydraulic disc
Brake Cable & Housing:
Shimano, hydraulic disc
Front Hub:
Shimano disc
Rear Hub:
Shimano disc
Spokes and Nipples:
Stainless steel
Kinetix Comp, for disc
Schwalbe Big Apple, Performance Line, 55-406, puncture protection, Reflex
Shimano, 1 x 9 spd, trigger
Rear Derailleur:
Shimano Sora
Vektron custom, forged 6061-AL crankarm
Shimano 11-32T, 9 spd
Bottom Bracket:
Motor integrated
9 spd, DHT for eBike, GST corrosion resistant coating
LiteForm QR, alloy body, QR right/standard left
Shifter Cable & Housing:
Jagwire LEX-SL, slick treatment, alloy ferrules
Bafang M400 Drive System, 36 V/250 W, max speed 25 kph (EU); max speed 20 mph (US), max torque 80 Nm
Bafang M400 Drive System Battery, 400 Wh, Panasonic cells
Bafang M400 Drive System Display, 5 mode selectable, walk assist
40-90 km (25-56 mi)
Bafang Charger
Bells & Whistles
DoubleStand, center mount
Clip System:
Magnetix 2.0
Luggage Socket:
Front Light:
Tern Valo Direct, integrated, 41 lux/150 lumens
Rear Light:
Herrmans H-Trace / H-Trace Mini, for eBike
SplashGuard, stainless hardware
Opt: Tern Cargo Rack
Pedal Holder