SON 28 Dynamo Hub

Full power even at slow speeds: the Son 28 hub dynamo by SON

The SON 28 is a hub dynamo universally approved for all wheel sizes from 16" to 29" . It reaches its rated power in a 28" wheel at about 16 km/h. It is therefore recommended if a particularly bright light is required when driving slowly or if other devices are to be operated or if batteries are expected to be charged. Compared to its predecessor the Son classic, the power loss during idling has been reduced by approx. 15% and the weight by has been decreased by 140 g.

Information regarding the return of batteries and electrical equipment:

Information on the return and disposal of used batteries and electrical equipment can be found here.

Specifications:

Output:

6V/3W (according to StVZO)

Efficiency:

65% at 15 km/h in a 28" wheel

Power Consumption at Idle Speed:

0.5 W at 15 km/h in a 28" wheel

Over Locknut Dimension:

9 x 100 mm quick release

Spoke Hole Count:

32 hole, 36 hole

Brake Type:

rim brake

Technical Information:

Series:

Son 28

Application:

City & Touring

Body Material:

aluminium (6082-T6)

Bearings:

deep groove ball bearing 629-2RSH (SKF)

Seals:

labyrinth seal, gaskets and pressure compensation system

Flange Distance (L/R):

62 mm (31 mm/31 mm)

Partial Bolt Circle Diameter (L/R):

54 mm/54 mm

Spoke Hole Diameter:

2 mm

Wire Connector:

4.8 mm flat plug, 2-pole, insulated return

Approved For:

Street Use in Germany:

yes

Check Number:

K~~834

Compatibility:

• for 16" to 29" wheels (400-742 mm)
• for 3 mm coaxial cable

Features:

• neodymium iron boron magnetic rotor, 26-poles
• hollow axle (10 mm) made of work-hardened, stainless steel

Manufacturer Numbers:

polished 32 hole:

303202

black 32 hole:

303212

silver-anodised 32 hole:

303292

red-anodised 32 hole:

303222

black 36 hole:

303612

silver-anodised 36 hole:

303692

red-anodised 36 hole:

303622

blue-anodised 36 hole:

303642

Contents:

• 1 x SON Son 28 dynamo hub
• 1 x bolt-on axle (hex socket)