DYU A5 - 250W - Folding E-Bike | Sähköpyörätehdas

DYU A5 – A foldable electric bike that revolutionizes everyday life and adventures

A "Top Gear"-style test drive in Kruunuvuorenranta

Sähköpyörätehdas the DYU A5 folding electric bike to Kruunuvuorenranta in Helsinki, where the shared test ride station is located. The test team waited with bated breath—and when the bike was unpacked, the atmosphere was just like a test drive of a new sports car.

The first burst of speed on the smooth asphalt of the beach road revealed that the DYU A5 is no ordinary ride. Its lightweight aluminum frame and 350W motor propelled it to a top speed of 25 km/h in an instant. Hills didn’t slow it down—the motor’s torque carried the rider up the slopes of Kruunuvuori like an electric wind at their back.

City Driving with Ease and Style

In downtown Helsinki, the DYU A5 shone with its agility. Stopping at traffic lights was smooth, and when the light turned green, the bike immediately picked up speed. The disc brakes provided confidence, and the foldable design made getting around easy: the bike fit into the subway, a bus, or the trunk of a car without any trouble.

The wilderness calls you to adventure

When the route took us onto sandy trails and rocky shores, the DYU A5 demonstrated its versatility. The suspension fork and seat post suspension smoothed out potholes, rocks, and tree roots—making for a stable and comfortable ride. Off-road, the DYU A5 combined traction and power in a way that made riding on gravel roads a real experience.

Lightweight yet durable construction

The DYU A5 weighs only 22 kilograms, but it has a load capacity of up to 150 kilograms. It is designed to handle both the frequent stops of a day in the city and longer off-road trips. When folded, it takes up very little space, but when unfolded, it offers the full riding experience of an electric bike.

Technical Summary – DYU A5

Motor: 350W brushless permanent-magnet motor
Battery: 48V 7.5Ah removable lithium battery
Range: 40–60 km on a single charge
Top speed: 25 km/h
Charging time: about 4–5 hours
Frame: aluminum alloy
Weight: 22–22.5 kg
Load capacity: up to 150 kg
Suspension: front fork + seat spring suspension
Brakes: front and rear disc brakes
Dimensions when folded: approximately 73 × 33 × 65 cm
Dimensions when unfolded: approximately 127 × 52 × 100 cm
Water resistance: IP54
Maximum angle of ascent: approximately 15°
Operating temperature: –10 °C … +45 °C

Experiences for Every Trip

The DYU A5 isn't just a bike—it's an experience. In the city, it makes your commute a breeze, and off-road, it turns your ride into an adventure. It's easy to take with you anywhere, folds up in an instant, and offers a solid riding experience in any weather.

We also want to share useful information about the world of e-bikes. If you’d like to learn more about e-bikes, their benefits, and how they can be used, I recommend checking out the following resources:

Network of Cycling Communities– Up-to-date information on cycling in Finland.
Traffic Safety– Tips for Safe Electric Biking.
Fillari Magazine– Articles and reviews on cycling and e-bikes.
Motiva– Information on sustainable transportation solutions.

I hope you find some useful information in these links!

Best regards,
The SähköpyöräTehdas Team

Motor: 350W brushless permanent-magnet motor
Battery: 48V 7.5Ah removable lithium battery
Range: 60 km
Top speed: 25 km/h
Charging time: about 4–5 hours
Frame: aluminum alloy
Weight: 22–22.5 kg
Load capacity: up to 150 kg
Suspension: front fork + seat spring suspension
Brakes: front and rear disc brakes
Dimensions when folded: approximately 73 × 33 × 65 cm
Dimensions when unfolded: approximately 127 × 52 × 100 cm
Water resistance: IP54
Maximum angle of ascent: approximately 15°
Operating temperature: –10 °C … +45 °C

First, select a color: Black

Electric Bike Factory Warranty – We're Here to Support You

All electric bicycles come with a manufacturer's warranty that covers the most important parts as follows:

Frame: 10-year warranty against manufacturing defects.
Electric motor and its components: 2 years.
Battery: 2 years.
Other electrical components: 2 years.

The expert staff at Sähköpyörätehdas will support you throughout the entire warranty process, so you
don't have to worry. We'll handle everything for you directly with the manufacturer.

How we handle warranty issues on your behalf:

1. If a problem arises – Contact us at
If your electric bike develops a fault, contact Sähköpyörätehdas customer service immediately. You can
contact us by email, phone, or by filling out the warranty form on our website.
We ask that you describe the problem in detail and send any photos or
videos of the issue, along with your purchase information. This will allow us to assess the problem as quickly as possible.

2. Problem Assessment and Inspection
When you contact us, our expert will assess the situation and determine whether the problem is covered by the warranty
. If necessary, we’ll direct you to the nearest service center or arrange for your bike to be picked up
for a more detailed assessment. We’ll take care of everything for you—all you need to do is report
the problem and send your bike in for inspection.

3. Warranty Processing – We’ll handle communication with the manufacturer
Once we’ve confirmed that the defect is covered by the warranty, the Sähköpyörätehdas staff will handle
all communication with the manufacturer on your behalf. This includes submitting the necessary documents and information
as well as ordering any replacement parts. A warranty repair may involve replacing a part,
repairing the bike, or even delivering a new bike if the defect cannot be repaired.

4. Fast and Efficient Service
We ensure that the problem is fixed as quickly and professionally as possible. We’ll handle
all service-related arrangements for you, so you don’t have to worry about the details.
We’ll keep you updated throughout the process and notify you as soon as the service or repair is complete.

5. After a warranty repair – We’ll arrange for the return at
Once the problem has been fixed or the defective part has been replaced, we’ll notify you and arrange for the return or pickup of your bike at
We’ll make sure everything is in order before we return the bike to you at
.

6. Costs Covered by the Warranty
If the defect is covered by the warranty, repairs, part replacements, and return shipping are completely free of charge for you.
If the defect is not covered by the warranty, we will offer you a paid repair service and provide
a cost estimate before starting the work.

Sähköpyörätehdas Supporting You Every Step of the Way

We are committed to ensuring that your electric bike works flawlessly throughout the warranty period.

We'll handle all warranty matters with the manufacturer on your behalf, so you can focus on carefree
driving.

Sähköpyörätehdas's customer service is always ready to help you—just contact us at
and we'll take care of everything for you.

Maintenance and Assembly of Electric Bikes at the Electric Bike Factory

You can have your electric bike serviced either at our store in Helsinki or at service centers located elsewhere in Finland. You can easily find your nearest service location [here].

Assembling an Electric Bike

When you buy an e-bike from us, you can rest assured that we’ve made everything as easy as possible for you. Our e-bikes come 90% pre-assembled, which means you don’t have to worry about complicated assembly steps. For the final assembly, you’ll receive all the necessary tools and clear, step-by-step instructions to ensure your e-bike is ready to ride in just about 30 minutes.

However, if you need help at any stage, we’re here to assist you. You can contact us at any time, and we offer free video guidance via WhatsApp to ensure the assembly goes smoothly. If you’d still rather not assemble the e-bike yourself, you can also bring it to our store, and we’ll assemble it for you—this service is also designed to keep the process easy and hassle-free.

First Aid

The first service should be performed after about one month of riding or when the e-bike has been ridden 100–300 kilometers. This initial service includes a thorough wash of the e-bike, a comprehensive inspection of the electrical components, adjustments to the brakes and gears, tightening of the spokes, lubrication of the chains, and a general condition check. This service ensures that your e-bike is in top condition and ready for safe riding.

Annual Maintenance

Annual maintenance includes even more comprehensive procedures: battery testing, drivetrain cleaning, tire inflation and replacement, chain lubrication, and inspections and updates of all electrical systems. We recommend annual maintenance regardless of how often you use your e-bike, to ensure it remains in top technical condition and safe to ride all year round.

Prices for Maintenance and Repair Services

We keep our maintenance costs competitive. The price for an initial service starts at 90 EUR, and a comprehensive annual service costs 149 EUR (including 25.5% VAT).

If you'd like us to assemble your electric bike for you, you can bring it to our store; the assembly service costs 69 EUR.

Service and Assembly Appointment

You can schedule a service appointment or a pickup by calling our store directly or visiting our website.

If you can't make it to our store in Helsinki, you can take advantage of our service network, which covers all of Finland. [Click here] to see all of our service locations and their contact information.