The first hub dynamo for a 15 mm thru-axle: the Son 28 15 by SON

Hub dynamo or thru-axle? Until now a demanding biker had to do without one of them. The thru-axle stiffens the suspension fork and allows a more precise positioning of the hub, which is particularly useful for disc brakes. More and more mountain bikers want to use the advantages of a hub dynamo light system. No wonder that SON was asked more and more often for a thru-axle hub dynamo. In order to bring both under one roof, SON has not only changed the axle construction, but also essential parts of the generator. The result: A hub dynamo that looks, is equally robust and has the same electrical values as the Son 28 Disc, but with a large " hole" . Also the weight could be kept surprisingly low with 460 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:

15 x 100 mm thru-axle

Spoke Hole Count:

32 hole, 36 hole

Brake Type:

6-bolt disc

Technical Information:

Series:

Son 28

Application:

All Mountain, Touring, City

Body Material:

aluminium (6082-T6)

Bearings:

deep groove ball bearings

Seals:

labyrinth seal and gaskets

Flange Distance (L/R):

47.5 mm (22.5 mm/25 mm)

Partial Bolt Circle Diameter (L/R):

59 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 15 mm thru-axle
• for 3 mm coaxial cable

Features:

• neodymium iron boron magnetic rotor, 26-poles
• hollow axle made from cold worked, stainless steel

Manufacturer Numbers:

black 28 hole:

332812

black 32 hole:

333212

black 36 hole:

333612

silver-anodised 32 hole:

333292

silver-anodised 36 hole:

333692

red 32 hole:

333222

red 36 hole:

333622

blue-anodised 32 hole:

333242

Contents:

• 1 x SON Son 28 15 6-bolt disc dynamo hub
• 1 x flat plug