Stripped mech hanger help please- helicoil v's frame saver

[crouch_potato]

To cut a long story short, I've discovered that around 1/3rd of the threads on the hanger of my beloved sunn have become stripped. Most of them are still there but enough have gone so that I can't tighten the mech on fully- hence it will not shift correctly.

Searching around on here has been useful as to finding the most probable solution- and I reckon the best two options are helicoil or a framesaver (a la this BETD one (hope link works).

Now all I was hoping was for some people with experience of either method to guide me through the pros and cons of each. I reaaaaallly dont want to mess this up on my pride and joy for over a decade. What would you go for- helicoil kit (and what size is it?) or the framesaver? Which is the best functioning solution? and which is the most foolproof?

Thanks for any advice on this- hoping that some of you might be able to allay my fears a bit and give me the confidence to do some minor surgery on the frame. Fingers crossed in any case.

 

[Crum]

Stay away from Helicoils.... They are quick and easy, but on something as thin as a der. hanger, they don't get much purchase, and will probably pull out..... When I repair threads, I use a "Time-Sert" http://www.timesert.com/ They are structurally better. Find an auto shop that already has the tools( used commonly to repair ruined spark plug threads in the head.... Tap the dropout, thread it in with a little red locktight on it, and then trim the back flush.... Just my take on a suitable repair..... Oh yeah.... It is 10mm x 1mm pitch Here is a link to a kit. A little on the pricy side, but aside from having the hole welded up and re tapped, This would be the best, and most secure method.. The framesaver requires you to put a wrench on it to remove your der. WIth a "sert" it would be just like normal...

 

[Inigo Montoya]

used the frame safer solution on a cheap alloy frame. worked fine and was easy to install but the time-sert solution looks way better.

 

[SeeingisBelievingGTMuseum]

Wheels manufacturing dropout saver perhaps

http://www.treefortbikes.com/product/33 ... Saver.html

 

[SeeingisBelievingGTMuseum]

Wheels manufacturing dropout saver perhaps

http://www.treefortbikes.com/product/33 ... Saver.html

 

[crouch_potato]

Thanks for the TimeSert link crum, looks worth investigating. On first impressions it looks like that might be the first choice, followed by the framesaver insert. Anyone else used the Time Sert method?

 

[tintin40]

The Helicoil on my frame hanger came out after 3 times of taking the mech off. But also i didn't know the the thread had been helicoiled. If i had i would have been more careful. (perhaps the seller didn't know either) I fitted a frame saver. Just pushed in. BUT the inside edge of the saver was just a little to close to 9th gear so that the chain would hit it.

 

[dyna-ti]

Ive used helicoil in a pair of cranks.I didnt have any problems when i used them.
Not sure about on a hanger there is not a lot of material there to grip the helicoil :?

 

[mikee]

you usally need 1.5 x thread dimeter for helicoils to work
so if your hangers 15mm thick you'll be okay

i guess not then
timeserts are great if fitted properly

frame savers a good thing too , fit it ,remove it then bond it into the frame
that way it wont unscrew ,fit the "nut" section to the outside of the frame
means no clearance issues too ,if its bonded in it wont give you any issues
either , but if it unscrews its attached to the mech so again no fuss

mikee

 

[crouch_potato]

Hi all- didn't mean to seem ungrateful for all the responses but was just out of contact with any functioning computers for quite a while. All the advice looks good, so after a short spate of singlespeeding I'm going to try my following the general advice you've given. Thanks everyone.