derailleur hanger alignment tool

[Guest Big H]

 

What all are forgetting in this whole debate is that when you bend or damage the dropout hanger you may also damage the dropout itself. If your dropout ...... the one the hanger bolts onto, is not also aligned your brand new spanking replacement hanger will in no ways be aligned.

 

Also remember that the fancy pansy tool you intend to buy mr Brunsdon depends on a rim that is PERFECTLY true. If you rim uis out of alignment the tool will give false readings.< id="gwProxy" ="">< ="jsCall;" id="jsProxy" ="">

[Johan Bornman]

Hey guys, sorry I've missed the discussion. I have to disappoint you from the outset - I don't have a ghetto solution.

 

I once tried to make a tool from an old derailer but if you wiggle your RD, you'll see that it has quite a bit of play. That play is amplified through an extension and you end up with a tool that gives you a +- reading of 20mm.

 

The long and sort of it all is that without a lathe, you're better off buying a tool or get your bike shop to quickly do the job for you.

 

A few of you pointed out that the rear wheel needs to be perfectly true, that is true. You also have to remove the tyre when doing the job.

 

In my experience, only permanent hangers are fixable and all removable ones are not fixable to my satisfaction. The reason is a bit complex.

 

Aluminium work-hardens quite easily. In other words, as you bend it, it becomes harder. It also goes for drilling, machining and threading operations. As you work, it becomes harder.

 

Alu doesn't become so hard that you cannot bend it back but....it becomes so hard that when you bend it back, it tends to bend in another place, leaving you with a wavy ingerface between hanger and frame. Since they usually only bolt on with one flilmsly bolt, the hanger always remain dodgy - a single bolt cannot squeeze the two surfaces flat and there is always play.

 

Replace the hanger. I've tried banging them on an anvil, heating and annealing them...not worth it.

 

On steel bikes with cast iron hangers you have no problems. It is easy to get is straight again and again and again.

 

As for the thread - yes it is 10 x 1 and quite difficult to get bolts and taps in those sizes. SRAM, Shimano and Campag all use 10 x 1 thread since this is a frame standard.

 

I find that bent and/or spare derailer hangers make for really hardcore necklace ornaments. Thread it through a piece of chain or leather thong, wear it around your neck and you'll be the Up from Upington on your squad.

 

PS - I don't have a derailer fix-a-band bend tool either. The only time I bent a derailer hanger, I took it to a bike shop. Chop-chop, cheap-cheap. Some tools are used just too seldom to own them.  

 

 

[no.one.knows]

or get ten of your cycling mates to club in for the hanger alignment tool and then that way, you have free use of it, it doesnt cost you R1000 but only R100.

 

And you can get the job done well each time.

 

 

 

[Christopher Brunsdon]

Thanks Pappa Bear and JB. Must say that I was inspecting my hanger and it has a slight warp to it, doubt I could bend it straight again. Will look for a new one tomorrow.

 

[Christopher Brunsdon]

Got a new hanger from my LBS for R65. They looked at my old one and said it could still be repaired but only with an alignment tool.Thank goodness it was just the hanger and not the derailleur and/or frame that got bent.

 

My LBS mechanic mentioned that except for new frames, they more often than not need to set the alignment when fitting new hangers on old frames.

 

[Tumbleweed]

You also have to remove the tyre when doing the job.

 

?

 

 

 

really?

[Mackie]

You also have to remove the tyre when doing the job.

 

really?

Sarcasm is the poorest form of wit! I dont see why it is essential that a forum always needs to have some useless post on it ! If you not going to add value or make someone laugh, stay away.

[100Tours]

 

I bought the tool and I've used it for 5 years+ now - it's usually in my bag for multiday races. it's been used for about 8 or 10 fixes on Swazi Trail, Sani2c, , but almost every time made the difference between someone being able to ride the next day or not. It still hasn't paid for itself because I've never charged anyone to use it. Then again none of my cycling stuff ever pays me back

 

I'm not sure why the tyre has to be removed, maybe there's a tech reason?

GotThatInCarbon2009-08-23 00:22:34

[ichnusa]

My solution....

 

 

 

Flatbar and bolt (from local 'bolt and nut' shop) and couple of spacers. Most importantly, works a charm and cheap to build... if you can find the bolt.

 

 

 

 

 

 

 

 

[Johan Bornman]

I like

[Guest Big H]

You also have to remove the tyre when doing the job.

 

really?

Sarcasm is the poorest form of wit! I dont see why it is essential that a forum always needs to have some useless post on it ! If you not going to add value or make someone laugh' date=' stay away.

[/quote']

Even worse when a single sentence is taken out of context and ridiculed...... but then that is how they train reporters to think.

[Christopher Brunsdon]

Hey ichnusa I love your solution. Flatbar seems better than square tubing. Going to give this one a try as all its going to cost me is a trip to Mr Bolt (which in turn is a good excuse to get some Flameros) ... and a piece of flat iron.

 

Since my damaged hanger is now a spare I've nothing to loose.

 

[droo]

You also have to remove the tyre when doing the job.

 

?

really?

 

Sarcasm is the poorest form of wit! I dont see why it is essential that a forum always needs to have some useless post on it ! If you not going to add value or make someone laugh' date=' stay away.

[/quote']

 

 

 

Even worse when a single sentence is taken out of context and ridiculed...... but then that is how they train reporters to think.

 

Off your high horses gentlemen, I think that was a genuine question. With the Park tool you can leave your tyre on.

 

 

 

http://www.parktool.com/images_inc/repair_help/DAG07.jpg

 

 

 

[Guest Big H]

You also have to remove the tyre when doing the job.

 

really?

Sarcasm is the poorest form of wit! I dont see why it is essential that a forum always needs to have some useless post on it ! If you not going to add value or make someone laugh' date=' stay away.

[/quote']

Even worse when a single sentence is taken out of context and ridiculed...... but then that is how they train reporters to think.

Off your high horses gentlemen, I think that was a genuine question. With the Park tool you can leave your tyre on.

http://www.parktool.com/images_inc/repair_help/DAG07.jpg

 

Thanx for highlighting the fact..... from you it is a geniuine answer...... but......

[Tumbleweed]

You also have to remove the tyre when doing the job.

 

?

really?

 

Sarcasm is the poorest form of wit! I dont see why it is essential that a forum always needs to have some useless post on it ! If you not going to add value or make someone laugh' date=' stay away.

[/quote']

 

 

 

Even worse when a single sentence is taken out of context and ridiculed...... but then that is how they train reporters to think.

Off your high horses gentlemen, I think that was a genuine question. With the Park tool you can leave your tyre on. http://www.parktool.com/images_inc/repair_help/DAG07.jpg

 

 

 

?

 

Thanx for highlighting the fact..... from you it is a geniuine answer...... but......

 

 

 

thanks droo. and to big h and mackiemoo, it was a genuine question. i had no issues with the other info that was posted, but having used these tools many times before, i wanted to know what the reasoning was behind having to take the tyre off.

 

big h, once again you see fit to attack my profession. at least they teach us to think instead of following blindly, and if you have no respect for journalists, ask johan bornman if he knows any.

[Tumbleweed]

You also have to remove the tyre when doing the job.

 

?

really?

 

Sarcasm is the poorest form of wit! I dont see why it is essential that a forum always needs to have some useless post on it ! If you not going to add value or make someone laugh' date=' stay away.

[/quote']

 

 

 

actually a pun is the lowest form of wit, but i digress. as you will see from subsequent posts, my question was valid and justified, and as such added value to the thread, which is more that can be said for yours.