#1
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chain skipping
hey guys,
my chain keeps skipping. when the upper portion of the chain is under tension the lower jockey wheel moves forward (i.e. towards the front wheel) and then the chain skips. this leads me to think that the problem is with the upper jockey wheel, maybe somehow not 'releasing' the chain quick enough but i dunno, any ideas?? the chain is new, no apparent stiff links and the cassette doesn't appear to be worn so i'm guessing its a setup issue. possibly i made the chain too tight?? how can i tell?? cheers all. |
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#2
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chain skipping
"phil" wrote in message
... hey guys, my chain keeps skipping. when the upper portion of the chain is under tension the lower jockey wheel moves forward (i.e. towards the front wheel) and then the chain skips. this leads me to think that the problem is with the upper jockey wheel, maybe somehow not 'releasing' the chain quick enough but i dunno, any ideas?? the chain is new, no apparent stiff links and the cassette doesn't appear to be worn so i'm guessing its a setup issue. possibly i made the chain too tight?? how can i tell?? cheers all. http://www.sheldonbrown.com/chains.html -- DTW .../\.../\.../\... I've spent most of my money on mountain biking and windsurfing. The rest I've just wasted. |
#3
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chain skipping
phil wrote:
hey guys, my chain keeps skipping. when the upper portion of the chain is under tension the lower jockey wheel moves forward (i.e. towards the front wheel) and then the chain skips. this leads me to think that the problem is with the upper jockey wheel, maybe somehow not 'releasing' the chain quick enough but i dunno, any ideas?? the chain is new, no apparent stiff links and the cassette doesn't appear to be worn so i'm guessing its a setup issue. possibly i made the chain too tight?? how can i tell?? Could be a number of things. Did you thread chain correctly thru the rear derailleur? There's a little "stop" chingus on the cage that's easy to miss. Stiff link? Back pedal slowly and watch for tell-tale skip over rear cogs. (Rivet not flush can cause this, too.) 8 speed chain on 9 speed drivetrain? Check cassette carefully for bent tooth/teeth. Ditto chain rings. Something wound around one of jockey wheels? Make sure both turn freely and smoothly. Finally, your cassette and/or chain ring(s) may be worn out (can't always tell by looking); this would cause skipping, although I doubt the "catching" thing with the jockey wheel you describe. Bill "Miles and Michael Paul can attest to my mechanical abilities" S. |
#4
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chain skipping
"phil" wrote in message ... hey guys, my chain keeps skipping. when the upper portion of the chain is under tension the lower jockey wheel moves forward (i.e. towards the front wheel) and then the chain skips. this leads me to think that the problem is with the upper jockey wheel, maybe somehow not 'releasing' the chain quick enough but i dunno, any ideas?? the chain is new, no apparent stiff links and the cassette doesn't appear to be worn so i'm guessing its a setup issue. possibly i made the chain too tight?? how can i tell?? cheers all. Sounds like the chain is new and the cassette isn't. To check, hold the rear brake and apply force the pedal. Make sure you are in a gear that you know slips. If the chain rides up on the cog, the cassette is worn. I broke a chain after 3months and the cassette looked good but the chain slipped. It is hard to tell. |
#5
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chain skipping
phil wrote:
hey guys, my chain keeps skipping. when the upper portion of the chain is under tension the lower jockey wheel moves forward (i.e. towards the front wheel) and then the chain skips. this leads me to think that the problem is with the upper jockey wheel, maybe somehow not 'releasing' the chain quick enough but i dunno, any ideas?? the chain is new, no apparent stiff links and the cassette doesn't appear to be worn so i'm guessing its a setup issue. possibly i made the chain too tight?? how can i tell?? cheers all. I think the bike is bad. You should toss it and get a new one. No, seriously....what everyone else said. Check condition of cassette and chainrings closer. New chain and no problems previously really points to worn cassette. I also recommend you check out Sheldon Brown's site. He talks lots about chain/cassette wear. He's also got some info on proper chain length, though I can't imagine that would cause skipping. 'Course I'm no trained expert there, others may chime in if I'm wrong. Make sure rear d isn't bent. Make sure cable is operating smoothly. Here it is again: http://www.sheldonbrown.com/chains.html More helpful stuff here as well: http://www.parktool.com/repair_help/...tml#drivetrain Tom |
#6
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chain skipping
thanks for the tips guys. i'm still not sure why its happening but
following up your ideas. cheers |
#7
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chain skipping
If the pulley has to much play it will make the chain
jump over. Time to replace them. I MTB 2004 |
#8
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chain skipping
On Tue, 24 Feb 2004 12:15:41 +0000, phil
wrote: hey guys, my chain keeps skipping. when the upper portion of the chain is under tension the lower jockey wheel moves forward (i.e. towards the front wheel) and then the chain skips. this leads me to think that the problem is with the upper jockey wheel, maybe somehow not 'releasing' the chain quick enough but i dunno, any ideas?? the chain is new, no apparent stiff links and the cassette doesn't appear to be worn so i'm guessing its a setup issue. possibly i made the chain too tight?? how can i tell?? cheers all. SS, Bill The mind serves properly as a window glass rather than as a reflector, that is, the mind should give an immediate view instead of an interpretation of the world. :-] |
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