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Tern Vektron Q9 2023 Folding Bosch eBike

Tern Electric Bikes

Tern Vektron Q9 Folding Bosch eBike

£2,999.00 £3,499.00 Save £500.00

In stock
View in store

E-Bike Key Specs


Bosch 400Wh


Bosch Purion


Bosch Active Plus


30-100 miles

View in store

E-Bike Highlights


Tern Vektron Q9 2023 Electric Bike Rider Review

The Tern Vektron Q9 folding bike is suitable for a mixture of uses. Be it riding to work and having the versatility to fold the bike on or off a train, getting to work and tucking away under a desk or all round leisure riding.

The Big Apple tyres are suitable both on tarmac and light forest tracks, bridle ways & canal tow paths. Need the versatility to fold away in the back of the car and travel to a destination? The Tern Vektron folding electric bike does just that.

Our 5 point review...


Lightweight, easy and quick to fold alloy frame


Up to 100 miles of range from the Bosch 400Wh Powertube battery


9 Speed Shimano Alivio Gearing


Reliable 50Nm Bosch Active Line motor


Simple, easy to use Bosch Purion display system


Tern Vektron Q9 2023 Bosch eBike Frame Mounted Battery
Tern Vektron Q9 2023 Folding Bosch eBike Folding Handlebars

Total versatility..

The new Tern Vektron Q9 could be the most versatile Bosch eBike on the market. Looking for portability & a efficient German assisted eBike? The Tern Vektron Q9 does just that.

The Vektron Q9 offers a unique approach to frame design. With a telescopic seat post and adjustable angle stem, it can accommodate riders from 4ft 10 to 6ft 5. A bike that suits all.

Although compact the wheel base is that of a regular bicycle, the handlebar, fork and overall geometry give for a nice smooth and comfortable ride whilst maintaining the practicalities of being able to pack this electric bike away.

Tern Vektron Q9 2023 Folding Bosch eBike Bosch Active Motor
Tern Vektron Q9 2023 Folding Bosch eBike Front Headlight

Total Portability..

Be it under the desk at work, on and off the train or stow away in the back of your car or motor home. The Tern Vektron Q9 offers up as a fully versatile and portable electric bike.

In 3 simple steps - The handlebars fold down, the frame folds in half and the seat can be retracted to fit this electric bike into even the smallest of places with ease.

The Tern folds from a complete bike down to folded format in under 10 seconds. This is due to the patented folding mechanism, which naturally folds as you release the catches. No magic involved, just excellent design!

Tern Vektron Q9 2023 Folding Bosch eBike Shimano Rear Derailleur

Brakes & Gears

Fitted with Shimano MT200 hydraulic disc brakes front and rear, the Q9 is a user friendly, low maintenance experience whilst having the true braking power disc brakes bring.

Gearing on the Tern is provided by Shimano's Alivio 9 speed drive train, for simple shifting both up and down hill.

Operated using a dual action trigger shifter on the handlebars, the shadow rear mech offers the lowest profile 9-speed derailleur to help avoid knocks or damage when riding or stored.

Tern Vektron Q9 2023 Folding Bosch eBike Shimano Brakes

Shimano hydraulic brakes are light on the hands but hard on the discs when needed, making it a great option for ultra-urban riding.

Tern Vektron Q9 2023 Folding Bosch eBike Shimano Rear Derailleur

9 speed gearing in the form of the Shimano Alivio 11-32t group set is well balanced for on and light off road use.

Tern Vektron Q9 2023 Bosch eBike Shimano Trigger Shifter

Alivio trigger shifters are quick, smooth and reliable, making this the perfect commuter bike.

Tern Vektron Q9 2023 Folding Bosch eBike Front Wheel

Wheels & Tyres

Kintex 20" wheels small enough to allow the bike to be easily stowable, but larger than most folding bikes and offer much greater stability and a larger contact patch with the ground. They're laced onto Shimano quick release hubs, making wheel removal a breeze.

The Tern Q9 comes equipped with Schwalbe Big Apple 20"x2.1" tyres. An excellent all purpose option, being a 20" wheeled bike there is a huge crossover with other styles of bike and so future tyre options are vast. More importantly they include the kevlar lining protection to help prevent annoying punctures.

Tern Vektron Q9 2023 Folding Bosch eBike Collapsible Seat Post

The bottom line..

The Tern Vektron Q9 offers all those rider essentials including a comfort gel saddle, adjustable handlebars, comfort grips and adjustable seat post.

On top of this, the Vektron comes fully equipped with mudguards, pannier rack & side stand.

Tern have developed a fully built in LED lighting system front and rear. Completely powered off the Bosch system there is no need to carry bulbs, batteries, and they can't be easily stolen and reused.

The new Tern Vektron electric folding bike ticks the boxes for those looking for a nice ride and neat solution to travel and storage. A nice simple, but good quality electric bike, suitable for a mixture of riding styles and rider heights.


Tern Vektron Q9 2023 Folding Bosch Active Line Plus Motor

Bosch Active Line Plus System

The 2023 Tern Vektron Q9 features the latest Bosch Active Line eBike system. Offering a larger sprocket upfront with no internal gearing, this motor is much quieter and features little resistance when pedalling outside of the assistance.

The system is designed to be smooth and is around 30% more compact than the previous Active line. Offering support up to 270% and peak torque levels of 50Nm this system offers smooth and subtle power delivery both around town and on longer rides alike.

Tern have equipped the Bosch Purion display, a revised smaller dash that offers quick vision of essential parameters whilst occupying a minimal amount of cockpit space.

The Tern Vektron Q9 2023 comes with a bigger 400Wh battery, offering a full day in the saddle with no battery range anxiety. Support is delivered in 4 different assistance modes up to 15mph.

Tern Vektron Q9 2023 Folding Bosch eBike Purion Display

The Bosch Purion display is effortlessly simple to use and offers the rider "at-a-glance" speed, power mode and battery information.

Tern Vektron Q9 2023 Folding Bosch eBike Active Line Motor

The Bosch Active Line motor has long been a common feature on Tern bikes. While lower power than some others, the bike is much lighter and it gives a mighty boost in Turbo mode.

Tern Vektron Q9 2023 Bosch eBike 400Wh Battery Pack

The Bosch PowerPack 400Wh battery neatly sits just below the seat, keeping the centre of gravity as low as possible for maximum stability.

Tern Vektron Q9 2023 What's Included?

What's included

Your new electric bike gets a full set-up by our workshop technicians ahead of delivery.

Your eBike will arrive with a user manual, keys (where applicable), charger & free follow up service (at our service center) within 3 months of delivery.

This electric bikes includes a 5yr warranty on the frame, 2yr warranty on all the electrics and 1yr warranty on the components. In the event of a problem, we handle all warranty claims via our dedicated support in-house.

E-Bikeshop is a UK Electric Bike Service Center and our in-house workshop is exclusively reserved for our own eBike customers. We have time to support the eBikes we sell.

Why choose E-Bikeshop?


General Bike Specifications

Frame Tern Hydro formed Alloy w/ Quadric Dropouts

Forks Tern Tarsus 6061 Alloy Hydro formed

Brakes Shimano Hydraulic Disc.

Shifters Shimano Alivio 9 Speed

Rear Mech Shimano Alivio 9 Speed

Cassette Shimano 11-32t 9 Speed

Chain 9 speed DHT eBike specific + GST corrosion resistant coating

Wheelset Kintex Alloy Rims on Shimano Disc Hubs

Tyres Schwalbe Big Apple 20 x 2.1"

Handlebars Tern Kinetix Comp, double-butted 6061Alloy

Stem Tern Andros Forged Adjustable Alloy Stem

Headset Flux Pro, angular contact bearings, Physis integrated

Seatpost Tern Alloy Telescopic

Saddle Tern Porter+ Prime Gel Padding

Weight 21.9 kg

Electric Bike Specifications

Battery Bosch Lithium Ionen 36 Volt, 400 Wh, with BMS Management

Display Bosch Purion Display / Integrated Buttons

Motor Bosch Active Line Plus, 250 Watt. 40 - 270% Assist, 50Nm

Range 30-100 miles of power assisted range, depending on terrain



Yes we offer a range of finance purchase options. These vary from 0% short term, right through to longer term loans on a % APR.

To see the estimated monthly installments on any bike, simply click the 'Calculate Payments' button towards the top of this page. You can select the deposit amount and loan period to quickly calculate the monthly cost before proceeding to place your order.

Finance is automatically processed online at the checkout when selected, you can learn more on our dedicated E-Bike finance page.

You can see what sizes this model is available in at the top of this page. Sizes are listed in centimeters and also specified S, M, L etc.

Some models have more available sizes than others. Whilst some bikes are only available in a 'one size fits all'.

Next to the size options at the top of this page, click 'Find my size'. Enter your inside leg measurement along with your arm length and height (in cm). Our special size calculator will show you what size you need to order. These are displayed in S, M & L etc to correspond with the size options.

Note: You may be a particular size on one model and a different size on another model. Please use the size calculator on each model page as sizes can vary between manufacturers and models.

You can view the stock status of any model/variant by selecting it at the top of this page. It will show you one of three stock status:

In Stock: In stock now and available to order for immediate delivery
Pre-Order: Available to pre-order with estimated date of arrival shown
Sold Out / Out of Stock: The model is completely sold out in this variant and no longer available to order

If this bike is showing as Out of Stock in your size, its worth checking if there's colour options as the same model and size may be available in a different colour. Failing that, we also offer a handy link to 'View similar bikes in this size'.

If you're placing a pre-order using the deposit option (instead of paying in full), it's not possible to add further items to your cart alongside the bike. Please get in touch once your pre-order is placed and we'll be happy to add any extras that you may require.

Yes, you may wish to collect your new electric bike from our HQ based in Farnham, Surrey. If so please select 'Collect in store' at the checkout.

We will then prepare your new eBike and be in touch to book a suitable collection day/time.

One of our experts is on hand to help you set up the correct position on your new eBike along with answering any questions that you may have.

If colour options are available, these will show below the size options at the top of this page. It's best to choose your size first and then click on each colour option to check its availability in that size.

Not all of our electric bikes have colour options available.

At e-bikeshop we work by appointment only, so we can talk to each customer on an individual basis to give the best advice possible.

We can talk you through your requirements, riding style and offer expert advice as to which model to select.

We generally keep over 150 eBikes built in our showroom. Note: Some models shown as 'Pre-Order' may not be in the showroom to view as the bike is still due from the supplier. We can also give you the opportunity to ride a similar electric bike so you can get a feel for how electric bikes work prior to purchase.
Should you wish to purchase, we give the option to take it away that same day (subject to stock) with any extras fitted and a handover session on the bike itself by one of our eBike experts.

Delivery for UK 'In Stock' items ordered before 1pm should be expected for delivery the next business day (this excludes weekends and public holidays).

You can learn more on our E-Bike delivery page. International buyers can view international delivery times.

For delivery on 'Pre-Order' items, the estimated arrival date is shown at the point of order. On arrival our team will make contact to settle any outstanding balance. Once settled in full, we'll then proceed to dispatch your new eBike without delay.

Yes, we exclusively offer 14 days free insurance on all of our new electric bike purchases. This is for UK orders only. Simply select to opt-in to the 14 days free insurance in the cart.

This not only covers for theft, but also covers you for public liability, breakdown, accessories, accidental damage and returning home cover. You can learn more on the dedicated electric bike insurance page.



In use for 2 weeks now for daily commute. Very pleased so far with the Bosch motor, the overall concept of the bike - rock solid and stable, with very good quality components. The only thing I miss is a slightly longer handlebar stem, better suited to my height - but the adjustability is a great plus.

KURT - Read more

Customer Reviews

Based on 3 reviews
Stephen Tredwell
Product is good, Very poor support

Bike is good but support is questionable, UK distributor closed and getting support from what seems to be a weak support network has taken a very long time. Ebikeshop directed me to Tern who took a week to respond. Yet to see what the result will be.

tolerable coffee and plenty of bike porn to

this is now ebike #3 from Martin and the crew, fantastic service, tolerable coffee and plenty of bike porn to look at after i've finished shopping for what i need. As usual Martin listened to what i wanted to use the bike for, and then recommended the most appropriate solution (which wasn't the most expensive :) )

the tern is a great bike, i use it for the end of a commute in london after parking up, it is a little bigger and heavier than say a non motorised brompton, but, and its a big but, it rides like a normal bike - no twitchiness, no wobbling, quick and direct steering, and goes like stink. Having ridden and owned hub and crank drive bikes, there is no comparison, assistance is quick, direct and torquey.

the other to mention is the adjustability and flexibility - this bike adjust in seconds (bars and seat) to be comfortable for me (6'1 and too many kg) or my wife (5'2 and not) it also happily tows my little boy on his trailer bike, carries a laptop and a projector, fits in the lift and under the desk at work, and has lights, mudguards, a clever bungee system, and a chain tucked well out of the way so i happily ride it in a suit. Equally it's at home as part of our campervan travelling down gravel paths, old railway lines and the like.

i'd reccomend this bike for anyone looking for a high quality, reasonably priced folder or even hybrid use bike.


In use for 2 weeks now for daily commute

In use for 2 weeks now for daily commute. Very pleased so far with the Bosch motor, the overall concept of the bike - rock solid and stable, with very good quality components. The only thing I miss is a slightly longer handlebar stem, better suited to my height - but the adjustability is a great plus - anyone between 150cm up to ca. 200cm height could ride this bike!