I've stripped a thread on my rear mech hanger and the mech no longer fits. Does anyone know if it's possible to retap the thread? Is there a tool available that will do it?
Thanks
Andy
Bike Forum
[closed]
Rear Mech Hanger Thread Stripped
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Posted 1 year ago #
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Get a new hanger and don't hang off your allen key this time.
If it's not a replaceable one then you can probably get a helicoil and don't hang off your allen key this time.
Posted 1 year ago # -
If the thread has stripped simply running a tap thru it won't really help as there is nothing left to create a thread.
If the mech hanger is not replaceable then an engineering shop / frame builders will be able to make an insert to fit to recreate the thread or build it up wilth weld and retap the thread
I dont know if a helicoil is available in that size but if so that is the best option
Posted 1 year ago # -
Failing that, some really cheap mechs have a shim that bolts through from the other side - bit likethe rear part of a chainring bolt. Drill the knackered thread out slightly and it'll fit. Did this on a bike years ago that didn't have a replaceable hanger. Worked fine for years.
Posted 1 year ago # -
OK thanks for the tips. It is replaceable but I can't find anywhere that sells them.
Andy
Posted 1 year ago # -
What frame is it? Your LBS should be able to order one in for you
Posted 1 year ago # -
Thanks float. I'll drop them a mail.
Posted 1 year ago # -
Posted 1 year ago #
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OOO, thanks for the BETD website link. They sell a replacement hanger that looks just like mine. I'll buy the hanger and a frame saver just in case it doesn't fit.
Thanks for all the help.
AndyPosted 1 year ago #
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