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

£159.99 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) , 372g (28)
- Width Axle Ends: 74 mm
- Warranty: 5 Years
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Questions & Answers (2)
Do you have stock of SON XS Polished silver 28 spoke for Brompton
28 Jan 2023
Thank you for your enquiry. The standard version SON XS for Brompton bikes is on our item number 11025, if you input this number into the search box & hit enter it will then take you straight to it.
Kind Regards. JP 30/01/23
Which spokes to use?
22 Feb 2018
What type and length of spokes do you advise to build this into a standard Brompton rim?
Hi there,

We recommend 144mm spokes. Most standard straight pull spokes of the right length will work.

We also sell these hubs as complete wheels - SJS Cycles part number : 37469 SILVER - SJS Cycles part number : 45872 - BLACK