It's s flip=flop track hub. I ride a single speed with one. The freewheel in traffic. Filp the wheel over and your ready for the track.
> During my recent French wanderings I found an old wreck of a
> racing
> cycle which I broke for parts. Upon dismantling the rear wheel
> today
> under the crust of dirt I found a Campag steel barrel hub. Funny
> thing
>
> is it´s double sided; one side´s fixed, the other for a multi
ple
> freewheel. Is that unusual or have I just not been attentive
> enough in
>
> the past?
>
> Regards,
> Toni Theilmeier, Belm, Germany.