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Tern Vektron Q9: Bosch Active Line Plus motor, 400Wh battery, 9-speed Shimano gears & hydraulic discs—folds fast, rides like a full-size e-bike
Tern Vektron Q9: Bosch Active Line Plus motor, 400Wh battery, 9-speed Shimano gears & hydraulic discs—folds fast, rides like a full-size e-bike
Tern

Tern Vektron Q9 9 speed 20in 400Wh Folding Electric Bike 2025 in Blue

£2,999.00 £3,300.00 9% off
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With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
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In the unlikely event that you are not satisfied with your purchase please feel free to return your items within 90 days of the purchase date for a full exchange or refund. Any item (excluding food, underwear or e-gift vouchers) can be returned to us for any reason within 90 days, provided that the item has not been used or fitted and is returned in its original packaging with valid proof of purchase.

It is recommended that you use a recorded delivery service or return to a store to ensure your items are received by us. We cannot assume responsibility for items that are lost in transit back to us.

Returning an item

Online or in-store purchases can be returned to any of our 12 stores free of charge or can be returned by post or courier at your cost after completing the online returns form below. If you are returning an item due to a fault, we will refund your postage costs.

Bikes & Bulky items

If you wish to return a bike or bulky item to us, please keep the box it arrived in and let us know by contacting our support team via our online webchat, email or by phone (020 45063856) and we will help arrange a collection.

Non Bike - Customer Returns Form

If you wish to return or exchange an item, please fill out the form below following the steps inside. Returns can be processed quicker if all required information is provided.




Terms & Conditions

Items must be returned in their original packaging and unused. Refunds will be issued once the product(s) have been received and inspected.

Click & Collect customers can buy with confidence knowing that they can review the item before deciding whether it is right for you before leaving the store. Should you decide it's not right for you, it can be conveniently exchanged or refunded straight away, or you still have up to 90 days to return it if you are still unsure.

Please note:
1. If the items we have sent you are faulty, damaged or not as we described, we will cover the cost of collection and the delivery of the correct item.

2. If we have delivered the correct bike but upon inspection, you decide the bike is not the one for you, we will charge you £50 for collection (£100 from Northern Ireland). If you do not have the original box in usable condition, we will charge you an additional £15 to provide one.

Refunds will be processed using the same method of payment used for the original purchase. Credit & debit card refunds must be made to the card used for the original purchase.

We are unable to offer a refund without a valid proof of purchase.

Tern Vektron Q9 9 speed 20in 400Wh Folding Electric Bike 2025 in Blue

Season:2025Sale

Brand:Tern

Code:812741026139

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.

Best in class.

In test after test, the Vektron is called the best folding ebike on the market. With an updated frame, upgraded Bosch motors, and a wide ecosystem of accessories to help you carry your stuff, the Vektron will easily turn a lot of your car trips 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 most.

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 frame-integrated Atlas V Rack™ is designed to fit a Thule Yepp Maxi or a Dash® RM seat—no adapters needed.

Key Features & Benefits

  • Full-Size Ride, Compact Fold:Folds in 10 seconds, yet delivers the stability and comfort of a full-size e-bike for city commutes or weekend rides.
  • Bosch Motor:Bosch Active Line Plus motor provides up to 50 Nm of torque
  • Safe & Versatile:Hydraulic disc brakes for all-weather control, adjustable stem for rider comfort, and Atlas V Rack for child seats or cargo.

Full Specification

  • Frame: Tern Vektron folding frame, patented OCL+ hinge, aluminium
  • Fork: Tern Tarsus, 6061-Al, hydroformed, disc
  • Motor: Bosch Active Line Plus, 50Nm
  • Display: Bosch Purion
  • Battery: Bosch PowerPack 400Wh
  • Charger: Bosch 2A Charger
  • Number of Gears: 9
  • Gear Shifters: Shimano Alivio, 9-speed
  • Chainset: Bosch Crankset 170mm, 38T
  • Rear Cassette: Shimano 11-32T, 9-speed
  • Chain: Shimano 9-speed
  • Rear Derailleur: Shimano Alivio Shadow RD
  • Bottom Bracket: Bosch Integrated
  • Pedals: Folding, non-slip
  • Rims: Double wall, 20" aluminium, 32H
  • Front Tyre: Schwalbe Big Apple, 20x2.15, puncture protection
  • Rear Tyre: Schwalbe Big Apple, 20x2.15, puncture protection
  • Brakes: Shimano hydraulic disc brakes
  • Handlebars: Tern Physis 3D, 3D forged, 12°, 290mm
  • Grips: Ergonomic, lock-on
  • Stem: Andros, adjustable, tool-free
  • Saddle: Tern Porter+, comfort padding
  • Seatpost: Tern Telescopic, 6061-Al
  • Extras: Rear rack (Racktime-compatible), integrated Atlas V Rack™, 20” mudguards, kickstand
  • Weight: 22 kg

Manufacturers reserve the right to change specifications without notice based on availability at the point of assembly.


Resizes in seconds to fit riders 147 – 195 cm (4’10” – 6’5”) so a single bike can be shared by the family

Explore Tern's recommended accessories - find the entire line of compatible accessories for your Tern bike with the Compatibility Checker.

Warranty Information for Tern:

For Bosch Electrical components, see Bosch website, in general motors and batteries have a 2 year warranty.
Tern bicycles are sold on behalf of “Tern” by selected Authorized Tern Dealers who understand the assembly and service needs of our products. Tern provides a warranty against defects in materials and workmanship to the original retail purchaser (“Owner”) of a Tern bicycle from the date of purchase according to the following terms:

  • Five Years:All Frames, Handleposts, and Forks developed by Tern.
  • One Year:All Tern or BioLogic branded parts and components, except as noted below.
  • Other:All other parts or components, including third-party Handleposts and Forks, are covered by the stated warranty of the original manufacturer of that part or component.

For full warranty policy please visit ternbicycles.com

Technical Information
  • Speeds:
    1 x 9
  • Weight:
    21.9 kg (48.3 lb)
  • Gear Inches:
    33" - 97" (2.65 - 7.72 m)
  • Folding Size:
    41 × 86 × 68 cm (16.1 × 33.9 × 26.8 in)
  • Folding Time:
    10 sec
  • Frame Sizes:
    One size
  • Distance: Seatpost To Handlebar:
    62 - 69 cm (24.4 - 27.2 in)
  • Distance: Saddle To Pedal:
    67 - 110 cm (26.4 - 43.3 in)
  • Suggested Rider Height:
    147 - 195 cm (57.9 - 76.8 in)
  • Max Gross Vehicle Weight:
    125 kg (275.6 lb)
  • Max Rider Weight:
    105 kg (231.5 lb)
  • Frame:
    Tern Vektron, hydroformed 7005-AL, OCL+ joint, 3 patented technologies
  • Fork:
    Tern Tarsus, 6061-Al, hydroformed
  • Handlepost:
    Tern Physis 3D, 3D forged, 5 patented technologies, 12°, 320 mm
  • Stem:
    Tern Andros, adjustable, forged construction, patented technology
  • Headset:
    Tern Flux, cartridge bearings, Physis integrated
  • Handlebar:
    Flat bar, 6061-AL, Tern Andros adapted
  • Grips/Bar Tape:
    Velo ergonomic, lock-on
  • Saddle:
    Tern Porter, patented GripPad design
  • Seatpost:
    Tern Telescope, 34.9/30.9 mm, 2014-AL
  • Seatpost Clamp:
    Tern Collar, 6061-AL, 2pc
  • 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
  • Rims:
    Kinetix Comp, for disc
  • Tyres:
    Schwalbe Big Apple, 55-406, puncture protection, Reflex
  • Shifter(s):
    Shimano Alivio, 1 x 9 spd, trigger
  • Rear Derailleur:
    Shimano Alivio Shadow
  • Crankset:
    Vektron custom, forged 6061-AL crankarm
  • Cassette/Freewheel:
    Shimano 11-32T, 9 spd
  • Bottom Bracket:
    Motor integrated
  • Chain:
    9 spd, DHT for eBike, GST corrosion resistant coating
  • Pedals:
    MKS EZY
  • Shifter Cable & Housing:
    Jagwire LEX-SL, slick treatment, alloy ferrules
  • Motor:
    Bosch Active Line Plus, 270% Assist, 50 Nm Torque, max speed 25 kph (EU); max speed 20 mph (US)
  • Battery:
    Bosch PowerPack 400 Wh
  • Display:
    Bosch Purion, 4 mode selectable, walk assist
  • Range:
    400 Wh: 55 -110 km (35-70 mi)
  • Charger:
    220V, 4A (EU); 100-240V, 4A (US)
  • Bell:
    Aluminum
  • Chainguard:
    SKS Chainblade
  • Kickstand:
    URSUS, rear mount
  • Clip System:
    Magnetix 3.0
  • Luggage Socket:
    Yes
  • Front Light:
    Tern Valo Direct, 190 lumens
  • Rear Light:
    Herrmans H-Trace, for eBike
  • Fenders:
    SplashGuard, stainless hardware
  • Rack(s):
    Atlas V Rack™, integrated 8 point mounting; Max load weight: 27 kg (60 lb)
Sizing Information
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