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PostPosted: Thu Jul 02, 2020 6:35 pm 
Old School Hero

Joined: Wed Jun 10, 2020 9:53 pm
Posts: 155
Location: South West,U.K.
I need some advice guys.

I have a 2005 scott genius rc Ltd which as most will know Does not have a replaceable derailleur hanger. And as the headline says it's bent from a big impact with a boulder.

Looking for thoughts on how to possibly straighten as best as poss.

I've considered heating, putting in a vice.

This is way out of my field of expertise. Any suggestions appreciated.

:)


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 Post subject: Re:
PostPosted: Fri Jul 03, 2020 12:12 am 
Gold Trader
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Joined: Fri Jan 23, 2009 2:30 pm
Posts: 16571
Location: Surrey
There are tools for this, but you can use a threaded axle in the mech bolt hole as it is the same thread. Gently and slowly, csnt stress gently and slowly enough, tease it back into shape. If you do it fast it will stress and weaken the metal more than you want.

From the pics it looks twisted to, so you could use a vice to flatten it out, again gently and slowly.


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PostPosted: Fri Jul 03, 2020 12:35 am 
Retro Guru

Joined: Tue Aug 21, 2018 3:43 pm
Posts: 793
Location: Cambridgeshire - flatlands (the horror, the horror)
yep ... cold resetting is possible and is fine. I did it with the subtle tool of a mahoosive Bahco adjustable spanner. You can tighten the spanner onto the hanger at different angles to get the bend and then the twist out....


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PostPosted: Fri Jul 03, 2020 8:40 am 
Old School Grand Master

Joined: Mon Feb 11, 2008 9:42 am
Posts: 3589
I've seen it done to another Scott of similar age. That bike is still being ridden round ~10 years after the repair. There was a repair kit to convert to a bolt on hanger for some models, haven't seen one of those for a few years either......


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PostPosted: Fri Jul 03, 2020 8:42 am 
King of the Skip Monkeys
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Joined: Wed Nov 07, 2007 4:34 pm
Posts: 32420
Location: Bournemouth's most wanted
But yours looks cracked and ovalised, danson67 may be able to assist if you send him pictures.


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PostPosted: Fri Jul 03, 2020 8:52 am 
Gold Trader / PoTM Winner / RB Rider
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Joined: Fri Jul 23, 2010 4:13 pm
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Location: Royal Forest of Dean (Still looking for the Bear !)
legrandefromage wrote:
But yours looks cracked and ovalised, danson67 may be able to assist if you send him pictures.



Was thinking the same thing, is it cracked ?


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 Post subject: Re:
PostPosted: Fri Jul 03, 2020 9:05 am 
Retro Guru

Joined: Sat Oct 25, 2008 12:17 am
Posts: 1399
Location: Chesterfield
I’ve got the tool for this if you any where near Chesterfield to borrow it


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PostPosted: Fri Jul 03, 2020 10:27 am 
Old School Hero

Joined: Wed Jun 10, 2020 9:53 pm
Posts: 155
Location: South West,U.K.
It is cracked,but I started to thread mech on to see if it would. And it did.

It's just the angle it's not ovalised. Thanks for the advice. Appreciated


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PostPosted: Fri Jul 03, 2020 10:53 am 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
Posts: 10124
Location: New Forest, UK
Another alternative is this...
https://www.ebay.co.uk/p/1260723126?iid ... 6YQAvD_BwE


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 Post subject: Re:
PostPosted: Fri Jul 03, 2020 4:18 pm 
retrobike rider
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Joined: Tue Jan 29, 2008 11:04 pm
Posts: 2541
Location: A wretched hive of scum and villainy...
Well, as the others have said...very carefully bend it back straight with a combination of vice and an axle (M10 x 1.0 thread).
Room temp is OK, no neeed to heat on a big forged dropout like that, just be very, very gentle.

With any luck it will go back straight, and a derailleur will hold in the thread when tightened, even though the hole is a little elongated. You'll need a dropout alignment tool for the final alignment work.
However to me it looks like there's possibly a crack there, too. If it is cracked, or breaks while straightening, then that's a whole different matter to be explored if the need arises...

If it can be straightened, but won't hold a derailleur well:
There are kits to mend this thread (VAR and Eldi at least) (https://www.bike-components.de/en/VAR/D ... t-p59752/) where the hole is drilled out to 13mm plain and a threaded sleeve with a nut on the end is fed through from the chain side of the dropout as the derailleur is screwed on. This works fine, but there needs to be a lot of meat on the hanger to cope with such a large hole, and can sometimes foul the chain on the smallest sprocket.
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Alternatively, an M10 x 1.0 Helicoil kit (same thread on small spark and glow plugs)...once the hanger is straight, drill and tap the hole slightly oversized, screw in the stainless steel thread insert...These are the right thread, but tend to be a little long, 13.5mm, so need a bit of work to prevent the loose ends from hanging out and snagging things.
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https://www.ebay.co.uk/p/1605593518

I have the equipment to do either of these procedures.

All the best,


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