Wossit for?

[danphoto]

That little jockey wheel on the posties' Pashleys.

Why do you need a jockey wheel with hub gears?

 

[corshamjim]

I don't know, but would guess it's so the chain won't derail if it's stretched a little.

Looking at the picture it seems I fitted the 3-speed shifter on the wrong side on my Pashley Paramount (if it matters I don't know that either).

http://www.pashley.co.uk/products/mailstar.html

 

[Cubist]

Yep, it's a chain tensioner.....keeps the chain taught so you don't have to go buggering about with the dropouts.