Rear derailleur rubbing on spokes
#26
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i did rebuild my rear wheel, so that might be a clue. Can you explain what do you mean by pulling, pushing and "yeet"ing ? I have followed instructions in Jobst Brand's Bicycle Wheel and my spokes are very tight, especially those on the derailleur side (actually, i'm afraid they might be even too tight)
from: https://www.sheldonbrown.com/torque-spoking.html
Which spokes did you use? If you used decent name-brand spokes, and you don’t weigh a ton, this really shouldn’t be an issue.
The general concept is that when you accelerate, you load the spokes with torque. This causes the spokes to flex towards the derailleur. The amount that it flexes by is determined by the construction of the spoke.
#27
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Did you check it, or have it checked, with a gauge or do you just not think it's bent?
That's a very common problem.and every time that I've encountered it, the cause was a bent hanger.
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#28
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The replacement ball bearings are the same size as those I took out, and I used the same number of them on each side. The cone nuts, however, may be ever so slightly thinner. Unfortunately I didn't think to measure the thickness of new ones against the old ones. But, assuming they're slightly thinner is why I'm going with the possibility that them being thinner causes the QR to draw the frame/dropout in closer to the wheels when clamped, and thereby making the derailleur just close enough to slightly rub on the spokes. My intent is to put a thin washer on each side of the axle inside the dropout, thereby keeping the frame/dropouts from closing in so much when the QR is clamped, to see if that eliminates the rubbing.
Dan
#29
Senior Member
I thought about that. But the wheel is still centered between the seat/chainstays.
And I do want to point out that it's only very slightly rubbing when it does. I'm not in any danger of completely destroying the wheel/derailleur (I don't think I am). But I can definately hear it rubbing ever so slightly. On the stand, when I have it on the largest gear...there is about one-eighth inch clearance between the derailleur and the spokes.
Dan
#30
Senior Member
Is the sound you hear emphatically caused by derailleur in spokes? Can you confirm this? Eyeball this? If you have to be on the bike and riding to be sure of this please do so slowly, somewhere out of traffic. If it can't be eyeballed a small noise could be all sorts of things.
#31
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Thread Starter
This rectified the problem. Did a test ride. It's no longer rubbing.
I guess the new replacement cones I used were just a fraction thinner than the old ones.
Dan
Last edited by _ForceD_; 03-31-19 at 12:01 PM.
#32
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@smashndash,
trailing spokes are on the inside flange, they have no contact with leading spokes ( 1~2mm clearance ) so torque shouldn't be the problem in my case.
trailing spokes are on the inside flange, they have no contact with leading spokes ( 1~2mm clearance ) so torque shouldn't be the problem in my case.