Tern Vektron S10

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Release Year
Charge Time
2.5, 3.5 Hours
Maximum Range
62 Miles
Top Speed
20 Mph
50 Nm
Volts and Amp Hours
36V 11Ah
Wheel Size
Number of Gears
48.6 lbs
Brake Type
Frame Material

Summary of Reviews

We have read all expert and user reviews on the Tern Vektron S10. In summary, this is what cyclists think.

21 reasons to buy

  • The Bosch Active Line Plus system offers 4 levels of power assist.
  • The Vektron’s 50Nm of torque provided ample grunt under load.
  • The S10 was said to fold quickly and easily.
  • A range of 50 to 100km makes city use worry-free.
  • The S10’s 10-speed Shimano Deore drivetrain gives ample pedal-power range.
  • The ability to fold down the Vektron means it’s easy to store in an apartment.
  • A diagonally-mounted battery keeps rack-mounted loads low and stable.
  • 20 inch wheels kept the Vektron’s center-of-gravity low.
  • The Andros adjustable stem allows riders to alter handlebar height and reach.
  • Tern’s own lockable OCL hinge is tall and stiff, to reduce excess movement.
  • An integrated Valo Direct rear light shines 150 lumens over dark roads.
  • With a telescopic seatpost, the Vektron fits riders from 4’10” to 6’5” !
  • Magura MT4 Hydraulic disc brakes were strong and safe.
  • The Atlas rack was strong, secure and kept the bike upright when folded.
  • Riders said that the Vektron was nimble and even that it handled “beautifully”.
  • Acceleration was described as being smooth.
  • Thule Yepp Maxi and Nexxt Maxi child seats attach directly onto the rear rack.
  • Schwalbe Big Apple tires were grippy and acted as suspension at low pressures.
  • The gel-padded Porter+ saddle was comfortable but not ‘squooshy’.
  • The Bosch Active Line Plus system was smooth and showed negligible resistance.
  • A removable headbadge reveals a mounting port for front rack accessories.

7 reasons not to buy

  • At 48.6lbs, one tester said it was a “beast” to carry when folded.
  • Tern accessories are needed to eke out the maximum versatility of the Vektron.
  • In Eco mode, the brunt of the Vektron’s weight is felt when pedaling.
  • One reviewer said the Vektron S10 handled a little nervously.
  • Testers said the charging socket wasn’t easily accessible.
  • Reviewers noted the high price of the Vektron range.
  • The rear derailleur sits close to a low-pressure tire and only 4cm above the ground.

Bottom line

The S10 is the flagship model in Tern’s Vektron range. Really, it seemed hard to fault. Yeah it’s heavy, like most e-bikes. But it’s powerful too. 50Nm of torque overcame any concerns over power output, even under heavy loads on steep climbs. This is an incredibly utilitarian and versatile vehicle for city use, commercial use and families. At this (not low) price, you get a vehicle that could replace a car.

Expert Reviews

86/100 based on 2 expert reviews

Folding Fast

For long, leisurely rides, this is the bike you want to have underneath you. It’s comfortable, fast over any terrain and even has a luggage rack… The Vektron’s big volume tires eat potholes for breakfast… Bosch electric system is smooth and fast with no motor resistance.

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Test Report: Tern Vektron S10 (Model Year 2019) [German]

The small, quite heavy bike convinces with a well thought-out folding mechanism and a Bosch motor, which is seldom found on folding bikes… it was a very successful performance, with which the Vektron S10 clearly rolled to a test victory.

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Electric Bike Review

Tern Vektron Video Review – Quality Folding Ebike with Bosch Centerdrive

It’s pretty great …A premium folding electric bike with Bosch drive system and leading warranty, sturdy and quiet with plenty of adjustability (seat post height and stem angle), smart accessories help you carry gear and stay dry without noise.

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yoga jitsu

Real Test Ride of the Tern Vektron S10 Turbo Mode Only

This bike is fun… Climbing with little pedaling effort… It’s nimble and the narrow handlebars are good for squeezing in small spaces…

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Foldable E-bike (Tern Vektron S10) – 7500 km Review – Modifications / Wearing Parts / Defects [German]

…after 808 miles, the chain was worn out… I’ve changed the brake pads… It’s annoying that after 3107 miles the Schwalbe Big Apple tire has a torn sidewall, while the tread is still good…

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User Ratings

100/100 based on 11 ratings
  • 5 star
  • 4 star
  • 3 star
  • 2 star
  • 1 star

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Compared to other bikes
#19 Best Electric
Top 30%
#21 Best Commuter
Top 20%
#59 Best of All Bikes
Top 20%


In comparison to averages of categories