SA hubs

[yedi]

Can anyone recall why links in indicator have different lenghts? I measured the lenght of those links in chain. In one indicator the lenght is close to 4mm and other 6 mm (lenght from rivet middle to rivet middle).

Is other type of chain used to drum brake hubs and other type for coaster brake hubs? Or has that link lenght changed in some year?

 

[yedi]

Any info for above?

 

[hamster]

You could try the CTC website:

http://forum.ctc.org.uk

It's a more sturmey-loving crowd!