The Schmidt SONDelux is a high-performance dynamo hub designed for riders who want reliable, always-on power for lights and low-draw electronics—without the weight or drag of traditional dynamos. Built in Germany by Schmidt Maschinenbau, the SONDelux is widely regarded as the gold standard for LED lighting systems, especially when paired with the Edelux II headlamp.
In this review, we explore the SONDelux’s design, efficiency, drag characteristics, compatibility, and real-world performance, with a focus on how it fits into modern bikepacking, randonneuring, and commuting setups.
Key Specifications
| Feature | Detail |
|---|---|
| Weight | 390 g (QR version) |
| Output | 6V / 3W |
| Axle Options | 9×100 mm QR, 12×100 mm thru-axle |
| Brake Compatibility | Rim or disc (Centerlock) |
| Spoke Hole Count | 20, 24, 28, 32, 36 |
| Waterproofing | IP65 equivalent (sealed bearings) |
| Warranty | 5 years |
| Made In | Germany |
Design and Build Quality
Precision Engineering in a Compact Shell
The SONDelux is a beautifully machined hub, available in anodised finishes like black, silver, and polished. Its compact size and low weight make it ideal for road, gravel, and lightweight touring bikes.
- CNC-machined aluminium shell with etched branding
- Sealed cartridge bearings for long-term durability
- Welded stator and claw-pole design for efficient power generation
- No plastic internals—everything is built to last
The attention to detail is exceptional. From the smooth flange finish to the perfectly aligned connector terminals, it’s clear this hub is built for decades of use, not just seasons.
Power Output and Efficiency
Optimised for LED Lighting
The SONDelux was the first dynamo hub specifically designed for modern LED lights, such as the Edelux II and Busch & Müller IQ-X. It delivers full power at lower speeds than older dynamo designs, making it ideal for:
- Urban commuting
- Audax and randonneuring
- Gravel and bikepacking routes with variable terrain
While it outputs the standard 6V/3W, it does so with lower internal resistance, meaning less drag and better efficiency at typical cycling speeds.
Drag and Rolling Resistance
Among the Lowest in the Industry
Independent lab tests show the SONDelux has exceptionally low drag, especially when the light is off:
| Speed (km/h) | Drag (light off) | Drag (light on) |
|---|---|---|
| 10 km/h | ~0.25 W | ~1.8 W |
| 20 km/h | ~0.6 W | ~4.5 W |
| 30 km/h | ~1.0 W | ~6.1 W |
Compared to other hubs like the Shimano DH-3N80 or SP PV-8, the SONDelux is quieter, smoother, and more efficient2.
In real-world terms, the drag is barely noticeable—even with the light on. Over 100 km, you might lose 3–5 minutes compared to a standard hub, but gain unlimited lighting and charging potential.
Charging Devices: Can It Power USB?
Yes—With Limitations
The SONDelux can be used to charge devices like:
- GPS computers
- Smartphones
- Power banks
…but only when paired with a USB converter like the Sinewave Revolution, Igaro D1, or B&M USB-Werk. However, due to its lower output at very slow speeds, it’s not ideal for heavy charging loads or ultra-slow climbs.
If your primary goal is to charge devices while riding, the SON 28 may be a better choice. It offers slightly more power at low speeds, with a ~40 g weight penalty.
Installation and Compatibility
Easy to Fit, Built to Last
The SONDelux is available in:
- Quick-release (9×100 mm)
- Thru-axle (12×100 mm)
- Rim or disc brake (Centerlock)
It fits into standard forks and is compatible with most modern LED lights. The spade connectors are simple to use and secure, and the hub is maintenance-free for tens of thousands of kilometres.
Bonus: SON offers a free bearing replacement service if they ever wear out—though most users report flawless performance for years.
Real-World Performance
Tested Across Seasons and Continents
Riders report:
- Instant light activation at low speeds
- No noticeable drag even with lights on
- Silent, smooth operation
- Zero maintenance after thousands of kilometres
Whether you’re commuting in winter darkness or riding the Veneto Trail unsupported, the SONDelux delivers reliable, always-on power without fuss1.
Pros and Cons
Pros
- Ultra-low drag and weight
- Fully waterproof and sealed
- Compatible with most LED lights
- Dropper-post and fork-friendly cable routing
- 5-year warranty and legendary reliability
- Made in Germany with ethical production
Cons
- Premium price (~£180–£230 hub only)
- Requires USB converter for device charging
- Not ideal for high-output charging setups
- Slightly less power at low speeds than SON 28
Comparison: SONDelux vs SON 28 vs SP PV-8
| Feature | SONDelux | SON 28 | SP PV-8 |
|---|---|---|---|
| Weight | 390 g | 430 g | 410 g |
| Drag (light off) | 0.25–1.0 W | 0.25–1.5 W | 0.5–1.75 W |
| Output at low speed | Moderate | Higher | Moderate |
| Best For | LED lights, fast touring | Charging + lighting | Budget dynamo builds |
| Price (approx.) | £180–£230 | £200–£250 | £120–£160 |
Final Verdict: Is the Schmidt SONDelux Worth It?
If you’re looking for a lightweight, low-drag, and beautifully engineered dynamo hub, the Schmidt SONDelux is one of the best options available in 2025. It’s ideal for riders who prioritise lighting over charging, and who want a fit-and-forget solution that will last for years.
While it’s not the cheapest hub on the market, its efficiency, build quality, and long-term reliability make it a smart investment for serious cyclists.
