The DUOTTS C29 city e-bike

DUOTTS C29 City E-Bike – Double the Power, Double the Range, Double the Smiles

One early morning, the phone rang for the Sähköpyörätehdas test team. On the other end of the line, DUOTTS’s logistics manager said calmly:
“The DUOTTS C29 is on its way to you. With two batteries. Make the most of it.”

We did the work we were told to do.

A couple of days later, a huge cardboard box was opened at the Kruunuvuorenranta test ride location.
We didn’t know at the time that this bike would revolutionize our understanding of what an urban e-bike can be.
This isn’t just a vehicle—it’s the freedom to move with two hearts.

⚡ 750W motor – an electric motor that really gets you moving

The DUOTTS C29 is equipped with a high-torque 750-watt brushless motor that springs to life the moment you start pedaling.
The acceleration is smooth yet decisive—like an electric train in the form of a bike.
The motor is quiet, but its power speaks for itself.

With 65 Nm of torque, uphill climbs aren’t an obstacle but an opportunity—and straight stretches invite you to accelerate.
City streets, dirt roads, forest trails—the C29 doesn’t ask questions; it just goes.

🔋 2 x 48V 15Ah batteries – unlimited driving

Here's the big news: The DUOTTS C29 has two batteries. Two!
A total of 1,440 watt-hours of riding pleasure.

On a single charge, you can:

160–200 km with assistance
100–120 km on full electric power

The removable and lockable batteries can be charged anywhere,
, and a smart system distributes power evenly between the two.
This is a bike for those who don’t want to stop—not even for a battery charge.

🛞 29” x 2.1” tires – smooth ride and traction

The large air-filled tires roll smoothly over everything.
Curb stones, crosswalks, dirt roads, or light off-road terrain—the C29 doesn’t flinch at anything.

Driving it is like sitting on a flying carpet equipped with disc brakes and more torque than common sense would allow.

🌇 The city is a game board—you are the king

The Shimano 21-speed drivetrain makes shifting smooth and efficient, whether you're at a traffic light, riding downhill, or stuck in traffic. The
C29 turns your commutes into adventures and your weekend rides into effortless getaways.

The smart display on the handlebars tells you everything:

Speed
Battery Status
Driving Mode
Distance traveled

The USB port keeps the phone running, too.

🧠 Three workout modes—decide for yourself how much you want to sweat

All-Electric: No pedaling, just pure enjoyment
Pedal-assisted: Light exercise powered by electricity
Manual: If You Miss the Old School (spoiler: you don't)

🛑 Powerful disc brakes – control in all situations

Powerful disc brakes at the front and rear bring the C29 to a precise and safe stop.
Rain, gravel, or a rush—the brakes always work.

📦 Technical Specifications – DUOTTS C29 Dual-Battery Model

Motor: 750W brushless
Batteries: 2 x 48V 15Ah (total 1,440 Wh)
Range: 160–200 km (hybrid), 100–120 km (all-electric)
Gear system: Shimano 21-speed
Tires: 29” x 2.1”
Suspension: Shock-absorbing aluminum front fork
Brakes: High-performance mechanical disc brakes
Driving modes: All-electric, hybrid, manual
Display: LCD screen + USB charging port
Accessories: Cargo rack, horn, taillight, cell phone holder
Charging time: ~6–8 hours for both batteries

🎁 Package Contents

DUOTTS C29 Electric Bike (2 batteries)
Charger
Rear Light and Luggage Rack
Mudguards
Tool Set
User Manual

➡️ Ready to drive—right out of the box

💥 Summary: DUOTTS C29 – an e-bike for those who never stop

This bike isn't just a means of transportation. It's a revolution in mobility.
The DUOTTS C29 e-bike, equipped with two batteries, is made for you—the rider who wants more:
more range, more power, more freedom.

The city is no longer a limitation. It is a starting point.

💥 Summary: DUOTTS C29 – an e-bike for those who never stop

This bike isn't just a means of transportation. It's a revolution in mobility. Equipped with two batteries, the DUOTTS C29 is made for you—for those who want more: more range, more power, more freedom.

The city is no longer a limitation. It is a starting point.

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: 750W brushless electric motor
Battery: 48V 15AH Duotts battery (removable, lockable) x 2
Range: 80–100 km with range-extender / 50–60 km on electric power alone
Driving modes: All-electric, pedal-assisted, and manual
Tires: 29 x 2.1" air-filled – excellent traction and comfort
Suspension: Aluminum front fork with shock absorption
Control Panel: Multifunction display, Shimano 21-speed, USB charging
Brakes: Powerful disc brakes in the front and rear
Accessories: Cargo rack, taillight, cell phone charger, and horn

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.