SON XS for Brompton Dynamo Front Hub - Semi Radial - Black

£209.99 Please note this product has selling restrictions to your country. was
Manufacturer : 
SJS Cycles part number : 
Manufacturer part number : 
Here they are at last: redesigned, new, small and narrow hub dynamos for folding bikes. Schmidt were able to make SON delux and SON 28 smaller and lighter owing to the spherical housing and reduced flange diameter. For SON XS, Schmidt had to advance technically: The new bodies have lateral slots instead of spoke holes. Straight pull spokes are placed into the slots as also found in system-wheels. This makes the wheel elegant and durable simply because there is no bending moment in the spoke elbow.

The new hubs are about 40 grams lighter than the previous XS models, which will continue to be for those devoted to classical design and polished surfaces. The new hub surface is anodized. Three standard versions (silver, black, silver-black-silver) are available from stock. Please note new semi-radial hubs are currently only available in polished or black.

- Electrical Power: 6V / 3W according to Geman government's road traffic regulations (StVZO)
- German Mark of Conformity: ~~~K 439 for 16" - 20"
- Efficiency: 60% at 15 km/h
- No-Load Power Input: 0.7 Watt at 15km/h
- Magnets: neodym iron boron, 26 poles
- Connection: 4.8 mm flat spades, 2-pin, to connect without ground connection
- Axle: Hollow axle aluminium 7075 T6
- Bearings: Deep groove ball bearing 629 2RSH (SKF)
- Hub Shell: Aluminium 6082 anodized
- Sealing: Alloy dust shields, rubber lip seals and pressure compensation system
- Weight: 345g (without skewer)
- Width Axle Ends: 74 mm
- Warranty: 5 Years
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Questions & Answers (2)
Do you take a la carte orders?
20 Jan 2020
for customizing specific colors on different side of the dynamo. also is this compatible with the sun cr18 rim you sell?
Yes, simply email [email protected]

The SON XS can also be individually configured to match the wide range of colors available on the Brompton folding bike. The side parts can be selected in high-gloss polished, silver anodized or black anodized. The two middle parts can be individually selected in the anodized colors silver, black, red, blue, orange, gold, light green and pink.

Thanks - 21/01/20
Spokes for a standard 2019 brompton rim?
11 Sep 2019
Which length spokes would I need for a standard Brompton rim from a 2019 bike? Do you have the spokes in stock? I couldn’t find the hub flange specs to calculate them.
Also will this work well with the supernova e3 lights?
We have the wheels pre built with Brompton rims here -

We would recommend using SON lights, Supernova lights will work otherwise.

Thanks - 11/09/19