Shimano Tiagra

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D

Deleted member 26715

Guest
Friend has a problem his rear derailleur has broken, he's sent this image is this the replacement? https://www.wiggle.co.uk/shimano-tiagra-4700-10-speed-rear-derailleur-gs

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Drago

Legendary Member
That looks like the hanger has broken, not the mech?
 
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D

Deleted member 26715

Guest
Any fix other than a new frame/bike?
 

Moodyman

Legendary Member
Mech hangers are sacrificial. The idea is they brake off so they don't destroy the frame in the event of impact.

You can get replacements as said upthread. Just need to search online. They are usually specific to bike or bike brand.

Google search Giant Defy mech hanger throws up several options at a tenner.
 

DCLane

Found in the Yorkshire hills ...
Unbolt the rear derailleur hanger from the derailleur and the frame, and order a new one. It should be a fairly easy match as it's a common bike.

When the new hanger is fitted, make sure that the high/low limits are correct.

And order a spare hanger for next time.
 
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D

Deleted member 26715

Guest
Educate me please, just looked at both my MTB's & the hanger is screwed on from the front, this looks like it's screwed from behind.

The bike is a Giant Composite, circa 2012
 
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D

Deleted member 26715

Guest
Thank you all, rang Giant in Sheffield with his serial number & they confirmed he needs a 1159-RE171A-003 which they have in stock, so he's on his way down.
 
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