Screw on front mech hanger - help!

Hey,

I've just got a nice Ferremi frame from eBay which I'm building up as a winter bike. It has a strange boss on the seat tube for the front mech - it seems to require a screw on mech hanger, onto which I could attach a standard bolt on mech.

I (naively!) thought this would be easy to find, but after a fair bit of google searching nothing has come up. Has anyone come across this before? Or should i ignore the screw-on boss and try to put a band-on mech above or below it?

Cheers,

Ewan

1 Attachment

Hmmm. Never seen a bolt on front mech hanger before. Usually they're riveted on a carbon or aluminium frame. For steel, it's usually brazed on.

If your search fails then a clamp on mech seems your best bet.

I've encountered exactly the same issue with a Vitus lo-pro I recently got... Another forum member kindly replied to my wanted thread for one of these front mech hangers with some useful links, have a look:

http://www.lfgss.com/conversations/276984/

As you say you could always use a band on mech, or a band on front mech hanger.

That seems unlikely for a derailleur hanger, but I'm at a loss as to what it could be for.

A derailleur hung from one point only, will be prone to pivoting around that single point.

If you offered-up a chainset, you could see if the mount was intended for a derailleur.

Google Simplex front mech Peugeot and you will see a couple of examples from the 80's.

Shaun

ie "French style braze-on tab"?

Thanks for all the replies. It seems that the French style braze on tab was used for a few years in the mid-80s as an alternative to the Italian style brazed hanger, so there are a few simplex and mavic front derailleurs that should fit. I'll try to track one down

I also had concerns about the derailleur pivoting around the point where it meets the frame, but maybe it's not an issue in practice. If I get one i'll let you know!

It seems strange for an italian-made (columbus sp/sl) 80's frame to have adopted the french system, I can only think that it must have been made for a specific mavic/simplex groupset