Schmidt SON 28 hub dynamo

As a disc version with a Centerlock brake disc mount, the SON 28 is similar in design and appearance to the SONdelux. In the standard version, the flange spacing and bearing spacing are increased by 12 mm and 10 mm respectively compared to the SONdelux. Compared to the classic SON 28 model from 2000 to 2011, idle losses have been reduced by approx. 15 per cent and the weight by 140 g. This means the spokes are angled more sharply, resulting in wheels with greater lateral stiffness. This makes the SON 28 ideally suited for use on gravel, touring and city bikes – in short, wherever particularly high stability is required. Compared to the SON 28 Kassik, the coasting losses have been reduced by approx. 15 per cent and the weight by 140 g.

Son 28 Dynamo:

The SON, Schmidt’s original 28-inch hub dynamo, has been the standard for high-quality, fail-safe bicycle lighting for years and, as a result of its design, remains unmatched even by new products from much larger companies. The secret lies in its gearless construction using high-quality materials and the adherence to tight tolerances, which is likely only achievable through handcrafting by a dedicated small team. The dynamo is switched off electrically only. Thanks to optimisation, the no-load losses when switched off amount to just 1 watt and are imperceptible even to the most sensitive cyclists whilst riding.

Schmidt SON 28 Hub Dynamo Technical Specifications:

• Electrical output: 6V / 3W in accordance with StVZO Approval: ~~~ K 179
• Permitted wheel sizes: 16–29 inches
• Efficiency: 65 per cent at 15 km/h Idle power consumption: 0.5 watts at 15 km/h
• Magnetic rotor: Neodymium-iron-boron, 26-pole
• Connection: 4.8 mm flat plug, two-pin, potential-free
• Cabling: Coaxial cable, PVC-free, 3 mm
• On/off switch: Switch in headlight housing
• Axle: Hollow axle made of cold-work hardened, stainless steel
• Bearing: Deep groove ball bearing 629 2RSH
• Seal: Gap seal, sealing washers and pressure equalisation system
• Hub sleeve: Aluminium 608
• Weight: 440 g, excluding quick-release axle
• Contents: Schmidt’s original hub dynamo and quick-release axle with Allen key

Your custom wheel with the Son 28 hub dynamo.

Ask us for a bespoke quote. We’ll build your dream wheel, perfectly hand-trued, with Mavic, DT Swiss, Notubes, eThirteen or Syntace rims. We use exclusively DT Swiss spokes. Over the last few decades – ever since we started building wheels – these spokes have proven themselves to be by far the most durable.

Herstellerinformation: SON, Aixer Straße 44, 72072 Tübingen, Germany, https://nabendynamo.de