COMING SOON! DYU C2 250W 16" Folding E-Bike

COMING SOON! The DYU C2 250W 16″ folding e-bike is a new-generation urban adventurer that uniquely combines performance and practicality. The Sähköpyörätehdas test team got their hands on this DYU C2—with its magnesium alloy frame and compact foldable design—and put it through a challenging test on the varied terrain of Kruunuvuorenranta in Helsinki. In this story, we’ll explain why this e-bike is an excellent choice for city streets, off-road trails, and even tackling steep hills.

Fast-paced city driving and smooth travel

The test tracks at Kruunuvuorenranta revealed the DYU C2’s best features right from the very first meters. The 250 W motor’s assistance and peak power of 500 W ensure smooth acceleration and effortless riding, even in congested urban conditions. The centrally mounted front suspension comfortably smooths out bumps, and the 16 x 2.5-inch tires keep the bike firmly on the road. Thanks to its light weight and agility, the hustle and bustle of the city becomes an enjoyable riding experience, and the folding frame makes it easy to store and transport both at home and on public transportation.

Smooth Travel and Safety

The magnesium alloy frame combines lightness and durability
The foldable design makes it easier to transport and store in everyday life
Front and rear disc brakes ensure quick and reliable stopping
The LED display and adjustable seat enhance user comfort
The powerful 7.5 Ah lithium-ion battery provides a range of up to 40 km with pedal assist

The test team's impressions of the challenging terrain in Kruunuvuorenranta

The Sähköpyörätehdas test team took the DYU C2 mountain bike out onto the sandy roads and forest trails typical of the Kruunuvuorenranta area. Steep uphill climbs posed no problem, as the 15-degree climbing ability and 48-volt motor provided exactly the right amount of power and assistance. With a top speed of 25 km/h and smart speed and cadence sensors, the assistance adjusts instantly to the terrain. The test group appreciated the bike’s easy handling, light weight (only 23.6 kg), and reliable braking, which made off-road riding enjoyable and safe.

Riding this electric bike lets you truly experience freedom and agility—whether on city streets, along interesting routes, or even on challenging hills. The DYU C2 isn’t just a mode of transportation—it’s a holistic experience that makes everyday travel even smoother—exactly the kind of e-bike that was highly regarded at the Kruunuvuorenranta community test site.

technical information

Frame material: Magnesium alloy
Body color: Blue
Tire size: 16 × 2.5"
Motor: 250 W rear-mounted motor
Peak power: 500 W
Battery voltage: 48 V
Battery capacity: 7.5 Ah
Charging time: about 4–5 hours
Top speed: 25 km/h
Range: up to 40 km (pedal assist), up to 30 km (throttle)
Brakes: Mechanical disc brakes front and rear
Assistance System: Cadence Sensor
Maximum weight capacity: 120 kg
Weight of the bike: 23.6 kg
Water resistance rating: IP54
Maximum angle of ascent: 15°
Dimensions when open: 1420 × 525 × 1080 mm
Dimensions when folded: 815 × 435 × 565 mm

First, choose a color: Blue-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.