Rear derailleur
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- Posts: 55
- Joined: 26 Jul 2013, 6:56am
Rear derailleur
The rear derailleur slightly touches the spokes when its in the biggest gear. I have checked the hanger and that is perfectly straight. Adjusted the L screw as much as I can. tried a different rear wheel but it is always very close to the spokes. More noticeable when pedaling with any type of force, the derailleur slight touches the spokes. I have looked at other bikes and the clearance is pretty significant compared to mine so not sure what to try next. Any help greatly appreciated. Many thanks in advance
Re: Rear derailleur
If pedalling hard makes something move, then something is loose.
Spokes slack?
Bearing play?
Q/R slack?
Axle broken, held by the Q/R?
(frame cracked.... ...?)
Spokes slack?
Bearing play?
Q/R slack?
Axle broken, held by the Q/R?
(frame cracked.... ...?)
Bike fitting D.I.Y. .....http://wheel-easy.org.uk/wp-content/uploads/bike-set-up-2017a.pdf
Tracks in the Dales etc...http://www.flickr.com/photos/52358536@N06/collections/
Tracks in the Dales etc...http://www.flickr.com/photos/52358536@N06/collections/
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- Posts: 55
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Re: Rear derailleur
Checked all these and all seem OK. When adjusted the maximum distance I can adjust it to is about a mm (if that) between derailleur and spokes, if that. This doesn't seem right. Therefore there is no or little tolerance
Re: Rear derailleur
If your dropout/gear hanger is bent I would have thought your testing with a gear hanger alignment gauge would have shown that up because anything else is guesswork.
I should coco.
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Re: Rear derailleur
It is a new hanger so it's definitely not bent
Re: Rear derailleur
but the frame might be bent where the hanger screws on...?
A photo would be useful?
It might help if you say which combination of hub, cassette and rear mech you are using too.
cheers
A photo would be useful?
It might help if you say which combination of hub, cassette and rear mech you are using too.
cheers
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~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~
Re: Rear derailleur
Have you had a truck roll over your rear wheel in the past week or two? Or put another way, had any crashes? Bike toppled over?
I should coco.
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Re: Rear derailleur
I'll post a pic tomorrow as it's a bit dark now.. it's a 105 mech, shimano cassette, moda carbon bike. I did have a knock hence the hanger broke and was replaced. No other damage to the bike or derailleur. The gap between derailleur and spokes was the same prior to the knock. Maybe a tad bigger but not significant
Re: Rear derailleur
what make of rear hub are you using?
Which shimano cassette....?
which generation of 105...?
cheers
Which shimano cassette....?
which generation of 105...?
cheers
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~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~
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Re: Rear derailleur
Not 100% sure but standard hub of R500 shimano wheels, 10 speed shimano 105 cassette, shimano 105 5701 derailleur. Hopefully this is the info :-/
Re: Rear derailleur
Looking from the back of the bike the derailleur should be perfectly vertical.
Is the wheel rim in the centre of the "dish" ?
Is the wheel rim in the centre of the "dish" ?
You'll never know if you don't try it.
Re: Rear derailleur
all those parts are pretty much designed to work together so that is a bit odd.
By any chance has someone inverted the inner cage plate on the rear mech? This would reduce the clearance to the point that it mightn't work at all....
BTW 10s #1 sprockets are dished so the mech sits closer to the spokes than with 9s systems.
cheers
By any chance has someone inverted the inner cage plate on the rear mech? This would reduce the clearance to the point that it mightn't work at all....
BTW 10s #1 sprockets are dished so the mech sits closer to the spokes than with 9s systems.
cheers
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~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~
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Re: Rear derailleur
Hi,
When the derraileur is quite worn it leans into the wheel
Slacken the cable / put it in top gear and grab the jockey cage at bottom and move in and out from wheel
On a new derraileur there should be no play, it will be obvious if there is play as you should be able to straighten the cage to a normal (perpendicular with ground) position when you pull it out gently.
Or even in gear nearest wheel spokes you will have play and it will be evident by rocking jockey cage in and out.
Idealy pick a gear which allows the cage to hang down furthest to floor, so the jockey cage is up right, and the derraileur body is also hanging down further to and view from side.
When the derraileur is quite worn it leans into the wheel
Slacken the cable / put it in top gear and grab the jockey cage at bottom and move in and out from wheel
On a new derraileur there should be no play, it will be obvious if there is play as you should be able to straighten the cage to a normal (perpendicular with ground) position when you pull it out gently.
Or even in gear nearest wheel spokes you will have play and it will be evident by rocking jockey cage in and out.
Idealy pick a gear which allows the cage to hang down furthest to floor, so the jockey cage is up right, and the derraileur body is also hanging down further to and view from side.
NA Thinks Just End 2 End Return + Bivvy - Some day Soon I hope
You'll Still Find Me At The Top Of A Hill
Please forgive the poor Grammar I blame it on my mobile and phat thinkers.
You'll Still Find Me At The Top Of A Hill
Please forgive the poor Grammar I blame it on my mobile and phat thinkers.
Re: Rear derailleur
+1 for possibly worn mech. I thought mine was fine till a gear shift had it scraping the spokes and almost mangling the new rear wheel. The new mech has a lot less play.
Bill
“Ride as much or as little, or as long or as short as you feel. But ride.” ~ Eddy Merckx
It's a rich man whos children run to him when his pockets are empty.
“Ride as much or as little, or as long or as short as you feel. But ride.” ~ Eddy Merckx
It's a rich man whos children run to him when his pockets are empty.
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Re: Rear derailleur
Some pics that maybe show the problem.
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