making a rear hanger ?

[RufusChucklebutty]

I picked up a Salcarno MTB, with no rear hanger or mech, I am a metal worker, making the thing is easy for me, can anyone tell me if any specific dimensions are designed into them ?

They do seem very complicated and expensive parts for what they do.

 

[screenman]

Less than a fiver on EBay, spend your time pedalling the bike not fixing it.

 

[Wobbly John]

There are a huge number of different designs of how they fit the frame - and it needs to be a good fit.

Derailieur threaded hole is a standard M10 x 1mm pitch (metric fine thread)

 

[RufusChucklebutty]

Er, I don't have the original, I can't order another one.

 

[PpPete]

take the frame to an LBS
They'll be able to identify the one you need in a couple of minutes.

 

[Globalti]

It has to be made from a brittle alloy so that it's sacrificial to protect the frame.