Schmidt SON 28/12 hub dynamo

The Son 28 / 12 for 12 mm thru-axles and particularly sturdy wheelsets. Until now, the discerning cyclist had to choose between the two. The thru-axle stiffens the suspension fork and allows for more precise positioning of the hub, which is particularly useful for disc brakes. The weight has been kept pleasingly low at 440 g; the new SON 28 resembles the SONdelux in construction and appearance. 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 SON 28 Classic model years 2000 to 2011, idle losses have been reduced by approx. 15 per cent and the weight by 140 g.

Son 28 Dynamo:

The SON, Schmidt’s original hub dynamo, the 28 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 simply switched off electrically. 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 /12 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 shell: Polished 6082 aluminium Number of spoke holes: 440 g
• Axle: Hollow axle made of cold-hardened, stainless steel
• for 12x100 mm thru-axle mounting
• Contents: Schmidt’s original hub dynamo
• Recommended lamp: Schmidt SON Edelux

Your custom wheel with the Son hub dynamo rim.

Ask us for a bespoke quote. We will build your chosen wheel, perfectly hand-trued. 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