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. Got more questions? Read our FAQs.


  • Fits easily on buses and subways for electric multi-modal commuting
  • Resizes in seconds to fit riders 147 – 195 cm (4’10” – 6’5”) so a single bike can be shared by the family
  • Stores under a desk for convenient theft protection; no need to bring a heavy lock
  • Stash a pair in the trunk of a car for weekend getaways
  • German-engineered Bosch Active electric drivetrain—the industry leader in electric bike technology
  • T-Tuned™ geometry for a full-sized ride and comfort
  • Valo™ lighting system, with 150 lumens of power, for 24-hour visibility
  • Rear Cargo Rack™ works seamlessly with Yepp child seats—Maxi Easyfit or Junior Easyfit—for carrying kids
Vektron S10: Our Best Bosch Folding Electric Bike
  • 20" wheels
EBR Choice Product Award Logo
Focus DE 2017 Vektron Logo


Product Reviews

The biggest deal with [the Vektron] is that it features a high-quality gold standard Bosch electric drivetrain [...]. It's well worth reading our page on electric bikes, highlighted above, to understand why the battery and motor choice really make a difference on ride quality of e-bikes, but in summary: you get what you pay for.

Cycling Weekly

The e-folding bike Vektron S10 from Tern meets the highest demands. It convinces with easy handling and good riding characteristics.

TCS Touring

The Vektron is the Mercedes S-Class of electric bikes. It’s beautifully built, with a high-quality feel to all of the mechanisms. It’s extremely comfortable to ride, even over longer distances, thanks to a strong motor and 10 gears that make hills a breeze.

Auto Express

The [Vektron S10] 'pack mule': Great everyday suitability thanks to a wide range of luggage carrying options. Absolutely safe handling.

Auto Touring

It’s not super often that I ride a folding bike and am able to forget it’s a folding bike. (...) The Tern Vektron S10 is a rare exception to this rule.

Electric Bike Report


General Info
1 x 10
Gear Inches:
30" - 93" (2.40 - 7.43 m)
Folding Size:
410 × 860 × 650 mm (16,1 × 33,9 × 25,6 sisällä)
Folding Time:
10 sec
Frame Sizes:
One size
Distance: Seatpost to Handlebar:
63 - 69 cm (24,8 - 27,2 in)
Distance: Saddle to Pedal:
74 - 114 cm (29,1 - 44,9 in)
Suggested Rider Height:
147 - 195 cm (57,9 - 76,8 in)
Max Load Weight:
105 kg (231,5 lb)
Tern Vektron, hydroformed 7005-Al, 3 patented technologies
Tern Tarsus, 6061-Al, hydroformed
Tern Physis 3D, 3D forged, 5 patented technologies
Tern Andros, adjustable, forged construction, patented technology
Flux Pro, angular contact bearings, Physis integrated
Kinetix Comp, double-butted 6061-Al
Grips/Bar Tape:
Ergon GP10
Tern Porter+, patented GripPad design, PrimeGel padding
Tern Telescopic, 2014-Al, 2 pc.
Seatpost Clamp:
Syntace OverLock
Front Brake:
Shimano Deore, hydraulic disc
Rear Brake:
Shimano Deore, hydraulic disc
Brake Levers:
Shimano Deore, hydraulic disc
Brake Cable & Housing:
Shimano, hydraulic
Front Hub:
Shimano disc
Rear Hub:
Shimano disc
Spokes and Nipples:
Stainless, double-butted
Kinetix Comp, for disc
Schwalbe Big Apple, 55-406, puncture protection, Reflex
Shimano Deore, 1 x 10 spd
Rear Derailleur:
Shimano Deore Shadow
FSA for Bosch
Shimano 11-34T, 10 spd
Bottom Bracket:
10 spd, DHT for eBike, GST corrosion resistant coating
LiteForm QR, alloy body, QR right/standard left
Bosch Active, 36 V/250 W, max speed 25 kph (EU); max speed 20 mph (US)
Bosch 300 Wh (EU); Bosch 400 Wh (US)
Bosch Purion, 4 mode selectable, walk assist
up to 50 - 100 km (EU); up to 40 - 80 mi (US)
Bells & Whistles
Pitch, brass
SKS Chainblade
Rear mount, Pletscher design
Clip System:
Magnetix 2.0
Luggage Socket:
Front Light:
Tern Valo Direct, integrated, 41 lux/150 lumens
Rear Light:
Herrmans H-Trace, for eBike
SplashGuard, stainless hardware
Tern Cargo Rack
Pedal Holder

*Note: These are our standard model specifications. The bike's weight and folded dimension may not include racks and fenders. The specifications for your country may differ slightly. 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.