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-   -   Is a non-replaceable derailleur hanger a bad thing? (https://www.bikeforums.net/bicycle-mechanics/159870-non-replaceable-derailleur-hanger-bad-thing.html)

fietsbob 01-07-11 04:22 PM

What are the consequences? you toss the frame in the rubbish bin
and get another one..

They're so light you can stand back quite a ways from the bin.

JanMM 01-07-11 07:24 PM

Wrench hasn't posted on BF since 08-22-08 05:10 PM
Maybe he's lurking and will see your post. Someone else may have info for you, of course.

JohnDThompson 01-07-11 10:10 PM


Originally Posted by BostonFixed (Post 1929943)
All of the older frames didn't have replacable derailleur hangers.



On an older steel frame road frame I have, the rear derailleur found it's way into the spokes due to my carelessness, bending the derailleur hanger, but the derailleur was perfectly fine. I did re-align the derailleur hanger/dropout with a 5 pound sledge hammer.

The dropouts on classic steel frames were forged from mild steel to allow them to bend for alignment and repair purposes. Modern frames don't retain this malleability and so disposable hangers are often used to allow easy replacement of the hanger when it is damaged.

vredstein 01-07-11 11:25 PM


Originally Posted by jemoryl (Post 1929390)
The solidity/crisp shifting argument sounds like total bollocks. And you mean to say if a stick goes up into my rear mech and cracks the hanger or a stay, the Scott people will replace the frame for a nominal price?
I think a replacable hangar is a good idea on an Al or carbon bike.

Sounds like crap to me too. Countless frames have bolted on hangers with shifting that's crisper than anything thought possible a dozen years ago. The amount of force a normal shift puts on the hanger is nowhere near enough to induce play in the interface if it's bolted on properly.

MilitantPotato 01-08-11 03:19 AM

Scott having non replaceable hangers on carbon frames is an easy way to make money off broken frames. The fact they try to use it as a selling point is shameful.

Also, BF should prompt you if you're bumping a thread more than a year old, IMO.

Retro Grouch 01-08-11 11:08 AM


Originally Posted by BostonFixed (Post 1929943)
On an older steel frame road frame I have, the rear derailleur found it's way into the spokes due to my carelessness, bending the derailleur hanger, but the derailleur was perfectly fine. I did re-align the derailleur hanger/dropout with a 5 pound sledge hammer.

Yeah, right.

For the record, I've bent a lot of steel frame derailleur hangers back using either just my hands or a big Crescent wrench clamped over the derailleur mounting bolt. I don't even take off the rear derailleur for fear of ovalizing the mounting hole.

Never found a use for a hammer that big in a bike shop.

Kimmo 01-09-11 01:46 AM


Originally Posted by Surferbruce (Post 1926476)
a ***** in an otherwise tough armor.

Seriously? We're worried about people calling each other *****s here?

Sheesh.

...Ha, the plural's not on the list!


Originally Posted by vredstein (Post 12045788)

Originally Posted by jemoryl (Post 1929390)
The solidity/crisp shifting argument sounds like total bollocks. And you mean to say if a stick goes up into my rear mech and cracks the hanger or a stay, the Scott people will replace the frame for a nominal price?
I think a replacable hangar is a good idea on an Al or carbon bike.

Sounds like crap to me too. Countless frames have bolted on hangers with shifting that's crisper than anything thought possible a dozen years ago. The amount of force a normal shift puts on the hanger is nowhere near enough to induce play in the interface if it's bolted on properly.

It doesn't sound like necessarily complete crap to me (shifts to larger cogs can briefly induce quite a bit of strain), but if it's a real effect, it's a 0.5 percenter...


Originally Posted by Retro Grouch (Post 12046929)
I don't even take off the rear derailleur for fear of ovalizing the mounting hole.

Nice tip. I guess ideally, you'd have a flat little bolt and nut for the job...


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