Derailleur hanger replacement

[Mets]

After one of our regular riding partners snapped his RD hanger recently, I’ve been thinking of getting myself a replacement hanger to have as a backup in case of emergency.

Question: Does each brand or model have their own unique hanger or do you get a generic tipe of hanger that will fit any RD from a specific manufacturer? I have a 2008 Mongoose Canaan Comp with XT rear derailleur. Do I search for a “XT-hanger” or a “Mongoose-hanger” or do I need to be more specific – 2008 Mongoose Canaan Comp XT hanger? Who stock these spares?

[AndreZA]

Each brand is specific. Sometimes even the model and year is deferent. Your LBS will be able to sort you out. Be prepared to pay up to R200 for some of them.

[Christopher Brunsdon]

There are some generic devices that just look like an oval washer that can act as an emergency hanger - some tool kits have them.

 

But get a spare - its something you will replace at some stage. Also you need to take your bike in when purchaseing a new hanger as they need to align it. I would like some input from JB on this but my LBS did explain the reasoning: comes down to the frame might be a bit off and a new hanger can throw you out completley.

 

A good LBS will not charge you. It is also worth having your current hanger aligned.

 

The tool costs R500-R1500 if your interested in owning one.

[Capricorn]

The bolt holes might be standard, but the shape and location almost never is. That is, I highly doubt you going to find a generic where one size fits all, even within the same brand.

 

I've had to have a rear mech hanger machined, and it cost me over R600, which reminds me I must have another made, as a spare

[kosmonooit]

I got some spare hangers for my Scalpel off ebay: not original Cannondale parts but those are hard to come by and too expensive here, and these looked good in terms of materials and quality of manufacture. They were $26 each, CNC manufactured in Israel, and they seem to have range: here's their ebay store

 

Don't know about alignment, normally its just a flat fit. At least on mine it fits into machined recess, there is no provision for any adjustments on any axes. They tool I think is to check for alignment to see if existing is bent.

Edited October 30, 2010 by kosmonooit

[Johan Bornman]

There are some generic devices that just look like an oval washer that can act as an emergency hanger - some tool kits have them.

 

But get a spare - its something you will replace at some stage. Also you need to take your bike in when purchaseing a new hanger as they need to align it. I would like some input from JB on this but my LBS did explain the reasoning: comes down to the frame might be a bit off and a new hanger can throw you out completley.

 

A good LBS will not charge you. It is also worth having your current hanger aligned.

 

The tool costs R500-R1500 if your interested in owning one.

 

Although derailer hangers are sacrificial parts, they still bend the frame a little bit before snapping off or indeed, just bending.

 

Therefore it is advisable to have the alignment checked if you've had an accident. Usually this will happen back home after the race.

 

The syptoms of a bent frame in the the derailler area are gears that shift nicely onto the first two or three sprockets and then become progressively worse throughout the rest of its range.

 

The tool is expensive and cheap ones are crap. You want accuracy, little play and lots of strength in these things.

 

I've never seen the emergency derailer washer thingy. I'd like to have a look at one. Who makes them?

[kosmonooit]

Got my spare hangers in from Pilo in Israel - all looks good so far, nicely made, and presented so can recommend their on-line shop www.pilo.co.il or via ebay. Came in registered post envelope.