Originally Posted by
fatbikeGM
AFIR there _used_ to be a SON hub for Birdy, it's just discontinued.
A duckduckgo search for "birdy son dynamo" brings me to a uk dealer called "sjscycles" [still not allowed to post URLs ...] who appears to have a SON hub for Birdy in stock.
But again the price (>200 gbp) puts it in the luxury category. At least it's polished silver and I like my Birdy to be all-black, so I desire it a bit less ;-)
Looks like this one:
https://www.sjscycles.co.uk/dynamos/...-hole/?geoc=NO
Costs about the same as the standard SONdelux which they recommend for small wheel bikes. If the goal is minimum resistance then SONdelux is probably the better option I think. The Birdy specific one will likely give better light at low speeds. (Edit: NB the sondelux won't fit the birdy, so for that there is only the linked one or the standard SP.)