DYU SP1

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• DYU SP1 €1,299.00
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The folding e-bike market is crowded. Nearly every brand offers a compact, 20-inch bike that folds down for trains, trunks, and tight apartments. But most of them share the same fundamental problem: they’re all solving the same problem in the same way.

DYU, the Chinese brand established in 2012 that has built a reputation for compact, lightweight, and affordable urban mobility solutions, decided to ask a different question. What if an e-bike could do more than just move the rider? What if it could also keep the rider’s devices alive throughout the day?

The answer is the DYU SP1, a 20-inch folding e-bike built around a removable power bank that doubles as a charger for phones, tablets, and other small electronics. First previewed at DYU’s offline product launch event in Berlin in autumn 2025, the SP1 drew strong interest for its unusual combination of compact e-bike design and portable power functionality. Now officially available, it’s time to find out if this concept is a genuine urban mobility breakthrough or just a clever gimmick.

More Than Just a Folding Bike

The inspiration behind the SP1 comes from a simple but powerful product philosophy often associated with Steve Jobs: meaningful innovation can happen when familiar daily tools are brought together into one intuitive experience. Just as consumer technology once combined music, communication, and connectivity into devices people could carry everywhere, DYU asked: what if an e-bike could serve as a portable power source for modern life?

The result is a folding e-bike that addresses two of the most common urban commuter frustrations: transportation and device battery anxiety. The SP1 isn’t trying to be the most powerful folding e-bike on the market, or the one with the longest range. It’s trying to be the one that fits most seamlessly into a connected, multi-modal urban lifestyle.

Weight That Actually Matters

Let’s be honest about folding e-bikes: the spec that matters most is rarely the one that gets the biggest headline. It’s weight. You feel it when the elevator is broken. You feel it when you have to carry the bike across a train platform. You feel it at the end of a long, wet day when your apartment stairs appear in front of you.

The SP1 weighs approximately 14 kg. That’s genuinely light for a folding e-bike. To put it in perspective:

The SP1 sits comfortably in the lightweight tier—comparable to premium lightweight folders like the Brompton T Line and CARBO Model X, but at a fraction of the price. This weight makes it genuinely practical for multi-modal commuting: train, bus, office, apartment, repeat.

Folded Dimensions

When folded, the SP1 measures 700 × 450 × 620 mm. That’s compact enough to slide under a desk, fit in a car trunk, or tuck into an apartment corner without becoming a permanent obstacle. The 20-inch wheels strike a careful balance: large enough to provide a stable, comfortable ride that doesn’t feel like a toy, yet small enough to fold into a genuinely compact package.

Frame Construction

The frame is built from aluminum alloy using 3D forging technology, combining a clean, modern aesthetic with everyday durability. It’s not the most premium material on the market—carbon fiber folders exist for those willing to pay a premium—but it strikes an excellent balance between weight, strength, and cost.

The Motor

The SP1 is equipped with a 250W DC brushless motor. This is the standard for EU road-legal pedelecs, providing assistance up to 25 km/h. It’s not a motor designed to win drag races or conquer mountain trails. It’s designed for one thing: effortless urban commuting.

The motor complies with EU pedelec regulations, meaning it assists while you pedal rather than turning the bike into a moped. For riders who need a legitimate, road-legal e-bike for daily use—not a rule-dodging speed machine—this is exactly the right specification.

AI Torque Sensor

This is where the SP1 gets interesting. The bike features DYU’s AI Torque Sensor, designed to read rider input more intelligently and deliver smoother, more natural pedal assistance.

Here’s why that matters: torque-based sensors are widely considered superior to cadence sensors because they measure how much force you’re applying to the pedals and deliver proportionate assistance. The result is more intuitive, controlled power delivery—particularly valuable in stop-and-go city traffic where smooth acceleration from a standstill makes a real difference.

The AI element suggests the system adapts to riding conditions and rider behavior, though real-world testing will be needed to verify how sophisticated this adaptation truly is.

Braking and Visibility

For stopping power, the SP1 uses TR 160 mm disc brakes. These provide reliable, consistent braking performance in various weather conditions—essential for urban riders navigating unpredictable city traffic.

The bike also features OSRAM lighting, a premium component choice that signals DYU’s commitment to safety and visibility.

Competitive Comparison: How Does the SP1 Stack Up?

Summary

The DYU SP1 is not trying to be the most powerful folding e-bike, or the one with the longest range, or the one with the most premium components. It’s trying to be the one that fits most seamlessly into a connected, multi-modal urban lifestyle—and it succeeds.

The power bank feature is the attention-grabber, but the 14 kg weight may be the feature that actually changes your daily routine. At this weight, the SP1 transforms from a bike you could fold and carry to a bike you actually will fold and carry.

If your commute involves trains, stairs, offices, and apartments—and your phone battery always seems to die at the worst possible moment—the SP1 isn’t just a folding e-bike. It’s a solution to two problems you’ve probably stopped noticing because you’ve accepted them as unavoidable.

The SP1 asks you to stop accepting them.

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