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#1
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Rear Wheel rubs chainstay
I'm had a recurring problem with my rear wheel on a bike I got used last
fall (Jans Schneider steel frame road bike). It tends to end up crooked to the left and rubbing the tire against the left chainstay. I've tightened the rear quick release--some people have suggest that it is too tight and may bind the wheel bearings. After looking at rear dropouts, I wonder if they are not straight. Would crooked dropouts cause this type of problem? Thanks, Kalukis |
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#2
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Rear Wheel rubs chainstay
In article ,
Kalukis wrote: I'm had a recurring problem with my rear wheel on a bike I got used last fall (Jans Schneider steel frame road bike). It tends to end up crooked to the left and rubbing the tire against the left chainstay. I've tightened the rear quick release--some people have suggest that it is too tight and may bind the wheel bearings. After looking at rear dropouts, I wonder if they are not straight. Would crooked dropouts cause this type of problem? Perhaps, but a more likely cause is the axle protruding too far past the lock nut on one side or the other. --Paul |
#3
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Rear Wheel rubs chainstay
"Paul Southworth" wrote in message ... In article , Kalukis wrote: I'm had a recurring problem with my rear wheel on a bike I got used last fall (Jans Schneider steel frame road bike). It tends to end up crooked to the left and rubbing the tire against the left chainstay. I've tightened the rear quick release--some people have suggest that it is too tight and may bind the wheel bearings. After looking at rear dropouts, I wonder if they are not straight. Would crooked dropouts cause this type of problem? Perhaps, but a more likely cause is the axle protruding too far past the lock nut on one side or the other. Yes that's one cause. Another is a broken axle. Phil Holman |
#4
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Rear Wheel rubs chainstay
What I forgot to mention is that this has been happening on several wheels
(with different axles) on the bike. The latest wheel was professionally built and is brand new, so I think we can rule out the broken axle theory. I'll look and see about the axle protrusion, but seems unlikely, given that this has happened with several wheels. "Phil Holman" wrote in message ink.net... "Paul Southworth" wrote in message ... In article , Kalukis wrote: I'm had a recurring problem with my rear wheel on a bike I got used last fall (Jans Schneider steel frame road bike). It tends to end up crooked to the left and rubbing the tire against the left chainstay. I've tightened the rear quick release--some people have suggest that it is too tight and may bind the wheel bearings. After looking at rear dropouts, I wonder if they are not straight. Would crooked dropouts cause this type of problem? Perhaps, but a more likely cause is the axle protruding too far past the lock nut on one side or the other. Yes that's one cause. Another is a broken axle. Phil Holman |
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Rear Wheel rubs chainstay
On Sat, 16 Aug 2003 22:41:09 GMT, "Kalukis" may
have said: I'm had a recurring problem with my rear wheel on a bike I got used last fall (Jans Schneider steel frame road bike). It tends to end up crooked to the left and rubbing the tire against the left chainstay. I've tightened the rear quick release--some people have suggest that it is too tight and may bind the wheel bearings. After looking at rear dropouts, I wonder if they are not straight. Would crooked dropouts cause this type of problem? Possibly, but if you aligned and properly locked the wheel in position, and it actually shifted, there should be scarred paint to show where it moved whether the dropout is bent or not. On the other hand, if the axle's badly off center, the QR may not clamp both sides equally, and the wheel can shift, possibly without scraping the paint off. (This is unlikely to be the cause of your problem if there's been no rear hub work done recently.) Or the axle may be broken. Or there may be a bad bearing in there that is getting progressively worse and allowing the wheel to appear to shift. (Another poster here recently found this to be his problem in a superficially similar instance.) Check everything before buying anything. And wait to see what other suggestions come up before deciding what to do. -- My email address is antispammed; pull WEEDS if replying via e-mail. Yes, I have a killfile. If I don't respond to something, it's also possible that I'm busy. |
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Rear Wheel rubs chainstay
On Sun, 17 Aug 2003 03:22:29 GMT, "Kalukis" may
have said: What I forgot to mention is that this has been happening on several wheels (with different axles) on the bike. The latest wheel was professionally built and is brand new, so I think we can rule out the broken axle theory. I'll look and see about the axle protrusion, but seems unlikely, given that this has happened with several wheels. Check the joints on the dropouts as well. You might have a loose one. This would most likely be something that will require a trip to the lbs to get fixed. (The probability of this being the problem is, in my estimation, extremely low, however...but it's still something to check.) -- My email address is antispammed; pull WEEDS if replying via e-mail. Yes, I have a killfile. If I don't respond to something, it's also possible that I'm busy. |
#7
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Rear Wheel rubs chainstay
Kalukis Mottley writes:
I'm had a recurring problem with my rear wheel on a bike I got used last fall (Jans Schneider steel frame road bike). It tends to end up crooked to the left and rubbing the tire against the left chainstay. I've tightened the rear quick release--some people have suggest that it is too tight and may bind the wheel bearings. I don't know how tight you make your QR or how you close it. A QR skewer should be screwed in to a point that the lever can be closed into the clamped position with a perceptible "over-center" response. That is, the lever, when rotated from the loose position to the tight one (180 degrees), passes over ha high point and falls into a position that requires force to open it again. Excessive force will crack the QR head. Whether the axle protrusion is too great or the closure force is inadequate, the result is the same, the right side of the axle moves forward from the pull of the chain. This can arise from dropouts that are too thin, which makes the axle extension too large on a wheel that otherwise works in other frames. It can be that the QR is aluminum and cannot clamp tightly enough. If the jam nuts on the axle are not knurled (serrated) they may have insufficient bite on a hard chromed dropout. In any case, the QR is not clamping the axle sufficiently. After looking at rear dropouts, I wonder if they are not straight. Would crooked dropouts cause this type of problem? That makes no difference. If the wheel is installed in the correct position it should stay there regardless of slight misalignment of the dropouts. Such misalignment may lead to axle failure because it puts a constant stress on the axle on which riding loads are overlayed, and it can cause dropout cracking. But these are not related to your current problem. Jobst Brandt Palo Alto CA |
#8
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Rear Wheel rubs chainstay
Have had a similar problem, turns out the rear stays aren't exactly the same
length. Seems to have been a manufacturing error. Something to be on the lookout for, even in "respected" frame builders. wrote in message ... Kalukis Mottley writes: I'm had a recurring problem with my rear wheel on a bike I got used last fall (Jans Schneider steel frame road bike). It tends to end up crooked to the left and rubbing the tire against the left chainstay. I've tightened the rear quick release--some people have suggest that it is too tight and may bind the wheel bearings. I don't know how tight you make your QR or how you close it. A QR skewer should be screwed in to a point that the lever can be closed into the clamped position with a perceptible "over-center" response. That is, the lever, when rotated from the loose position to the tight one (180 degrees), passes over ha high point and falls into a position that requires force to open it again. Excessive force will crack the QR head. Whether the axle protrusion is too great or the closure force is inadequate, the result is the same, the right side of the axle moves forward from the pull of the chain. This can arise from dropouts that are too thin, which makes the axle extension too large on a wheel that otherwise works in other frames. It can be that the QR is aluminum and cannot clamp tightly enough. If the jam nuts on the axle are not knurled (serrated) they may have insufficient bite on a hard chromed dropout. In any case, the QR is not clamping the axle sufficiently. After looking at rear dropouts, I wonder if they are not straight. Would crooked dropouts cause this type of problem? That makes no difference. If the wheel is installed in the correct position it should stay there regardless of slight misalignment of the dropouts. Such misalignment may lead to axle failure because it puts a constant stress on the axle on which riding loads are overlayed, and it can cause dropout cracking. But these are not related to your current problem. Jobst Brandt Palo Alto CA |
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