DYU FF500 – The electric fat bike that took the test ride by storm in Kruunuvuorenranta, Helsinki

Sähköpyörätehdas the DYU FF500 electric fat bike directly to Kruunuvuorenranta in Helsinki, where the electric bike factories’ shared test ride site was located. Our test team knew right away that something special was in store. When the box was opened and the DYU FF500 was taken out, there was a sense of excitement in the air similar to when a sports car’s engine is started for the first time.

Right from the first ride on the smooth asphalt of the lakeside road, the DYU FF500 showed what it was capable of. Its 500-watt motor provided powerful acceleration, and the bike easily reached speeds of up to 32 km/h. The steep hills along Kruunuvuorenranta weren’t an obstacle, but an opportunity—the DYU FF500 climbed them effortlessly, allowing the rider to focus on enjoying the scenery.

As the ride continued into the countryside, along gravel paths and over coastal cliffs, the DYU FF500 showed its true colors. The 20×4-inch-wide fat tires gripped the ground firmly and propelled the bike steadily forward, whether the surface was sand, gravel, or tree roots. The front suspension and seat post absorbed all the bumps, making the ride smooth and enjoyable. In the city, the DYU FF500 is just as impressive: it glides effortlessly through traffic, stops quickly with its powerful disc brakes, and folds up easily to fit on the subway or in the trunk of a car.

The test team agreed: The DYU FF500 isn't just an electric bike—it's an experience. It combines off-road capability, the agility of a city bike, and the power of an electric motor into a single package that's sure to put a smile on your face.

The test drive begins at the factory and ends in Kruunuvuorenranta

The DYU FF500 immediately caught my attention the moment it was taken out of the box. Its sturdy frame and massive tires screamed “adventure” even before the bike had touched the asphalt.

City Driving with Speed and Confidence

I had no trouble navigating the streets and waterfront paths of Helsinki. The top speed of 32 km/h gives you just the right sense of speed, and the electric assist made riding effortless. The disc brakes stopped the bike precisely, and the foldable frame made it easy to transport.

In the great outdoors, in their element

The DYU FF500 is designed for trails, sandy roads, and varied terrain. Its fat tires provide traction, and the suspension ensures comfort. Every hill, turn, and downhill stretch is a new opportunity to enjoy the perfect balance of speed and control.

Lightweight to carry, powerful on the road

Although the DYU FF500 weighs 31 kilograms, its frame folds up, so it fits easily in the trunk or inside a car. With a load capacity of up to 150 kilograms, it accommodates riders of all sizes with ease. This electric fat bike is built to last and to get you where you need to go.

DYU FF500 – Technical Summary

Motor: 500W brushless pole-mounted motor
Battery: 48V 14Ah LG lithium battery, removable
Range: up to 70 km on a single charge
Top speed: 32 km/h
Charging time: about 6–7 hours
Frame: aluminum alloy, foldable
Weight: about 31 kg
Load capacity: up to 150 kg
Tires: 20 x 4” fat tires
Gears: Shimano 7-speed
Suspension: front fork + seat post
Brakes: front and rear disc brakes
Water resistance: IP54
Maximum angle of ascent: approximately 15°
Dimensions when folded: 95 × 50 × 80 cm
LED headlight and clear display

An experience on every trip

The DYU FF500 turns your commute into fun and your weekend ride into an adventure. It’s not just a mode of transportation—it’s a bike that draws you outside and puts a smile on your face every time you turn the handlebar.

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: 500W brushless pole-mounted motor
Battery: 48V 14Ah LG lithium battery, removable
Range: up to 70 km on a single charge
Top speed: 32 km/h
Charging time: about 6–7 hours
Frame: aluminum alloy, foldable
Weight: about 31 kg
Load capacity: up to 150 kg
Tires: 20 x 4” fat tires
Gears: Shimano 7-speed
Suspension: front fork + seat post
Brakes: front and rear disc brakes
Water resistance: IP54
Maximum angle of ascent: approximately 15°
Dimensions when folded: 95 × 50 × 80 cm
LED headlight and clear display

First, choose a color: Light blue

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.