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Old 01-14-13, 04:13 AM   #1
Irongoose
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Rear mech problem

Hi, please excuse my ignorance if this is a stupid question but I'm a beginner to all this. I have a bit of a problem and I wonder if someone could help me out. I have this frame: http://www.on-one.co.uk/i/q/FROOPO13...ine_2012_frame and want to put a rear mech on it but there is no place to bolt on a hanger. I've seen various claw type mech hangers but can't work out whether they would work with QR wheels?

Could anyone suggest a durable hanger that would solve my problems. Your help would be much appreciated.

Cheers

Ed.
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Old 01-14-13, 05:11 AM   #2
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Ed, The pros may correct me, but I don't think that you can, or at the least shouldn't use QR skewers on a claw hanger that doesm't bolt to the drop out.

Brad
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Old 01-14-13, 05:21 AM   #3
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I thought this may be the case due to a lack of any firm information on the net, it appears my option has to be an Alfine set-up but I was trying to avoid spending the extra money as I had some spare XT hub wheels.
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Old 01-14-13, 05:26 AM   #4
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The track frame design is not designed to accept the "claw" hanger for a rear derailleur.

That being said, I have seen a version where the claw hanger was modified to mount on the derailleur backward. The derailleur anchor bolt leads into the dropout. I saw this modification many years ago, perhaps even prior to index shifting.

Depending on your choice of components this may or may not be possible. This may be the time to seek a very experienced (i.e. old) mechanic.
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Old 01-14-13, 06:25 AM   #5
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Ed, The pros may correct me, but I don't think that you can, or at the least shouldn't use QR skewers on a claw hanger that doesm't bolt to the drop out.

Brad
I'd say you'd probably get away with it if you had a decent-quality closed-cam skewer like the ones Shimano use. I've got one clamping the back wheel of my main bike in place against the chain tension from a 26-tooth granny chainring, with horizontal dropouts, and it doesn't slip, so I'd say it'll clamp a derailleur on just fine if you do it up properly.

There is a chaintug-style tensioner for track rear fork ends available that has a derailleur hanger built into it. I can't remember who makes it.

It wouldn't be terribly "quick" to fit or remove the wheel with that setup though, as you'd probably have to take the chaintug off to get the wheel out of the frame, and putting the whole thing back on again while dealing with the spring tension from the derailleur trying to rotate the chaintug would be a pain in the arse.
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Old 01-14-13, 06:31 AM   #6
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http://www.chainreactioncycles.com/M...f4067a9aa2b3df



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Old 01-15-13, 11:57 AM   #7
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Neato. Way nicer than a crappy old claw.

...Hm, even more of a hassle, though
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Old 01-15-13, 12:21 PM   #8
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why bother with the bodge..

Stick an IGH wheel, in the back and take advantage of the chain tensioning capacity
of the track frame end..

Being 135, you can fit a Rohloff.. or Alfine 11 ..
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Old 01-15-13, 12:35 PM   #9
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why bother with the bodge..

Stick an IGH wheel, in the back and take advantage of the chain tensioning capacity
of the track frame end..

Being 135, you can fit a Rohloff.. or Alfine 11 ..
The OP stated than they had a spare wheelset lying around that they wanted to use.
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Old 01-15-13, 12:37 PM   #10
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Let sleeping dogs lay..

QR axles slip, in horizontal dropouts unless you really get them tight.
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Old 01-15-13, 01:36 PM   #11
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Quote:
Originally Posted by Irongoose View Post
I thought this may be the case due to a lack of any firm information on the net, it appears my option has to be an Alfine set-up but I was trying to avoid spending the extra money as I had some spare XT hub wheels.
Hopefully you XT hub wheelset has 700c/29er rims and not 26. Your best bet here is to switch out the QR axle with a nutted solid axle. The axles are inexpensive and all you need is a couple of cone wrenches to do the job; should solve most your problems with very little expense.
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Old 01-15-13, 02:23 PM   #12
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Ive seen it before, just make sure to never get a flat.
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Old 01-15-13, 07:11 PM   #13
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Quote:
Originally Posted by fietsbob View Post

QR axles slip, in horizontal dropouts unless you really get them tight.
Not mine. My current bike has horizontal dropouts and either a 28 or 26-tooth granny ring. As I said, I've never had the wheel slip. I've also run a 42-16 fixed-gear setup with a QR rear axle, again, with no slip.
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