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#1
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2 broken 10sp chains in two weeks?
I've got an Ultegra 6600 setup with FSA Gossamer cranks, all pretty
much new (roughly 1000 miles so far.) First chain was a KMC DX10 which snapped a couple weeks ago. I'd hung the bike up wet and left it in a basement for a few weeks, and by the time I picked it up spots of rust were visible on the chain. I measured it for stretch but found none, lubed and cleaned it, but it snapped while in a lowish gear easing away from a stop light. I figured that I'd have to chalk it up to rust. I picked up a new Shimano 105 chain, removed extra links, used their rivet to connect, checked it for stiff links, but that chain also snapped after maybe 30 miles of easy use at one of the regular rivets (not the installation one). Naturally, I checked the rings and cogs for anything seriously askew but couldn't find it. The derrailleur alignment looks pretty good. It's a 53/39 and 12-23 setup so there's no crazy gearing, and I maintain as straightish a chainline as reasonably possible. In all, the drivetrain runs pretty smoothly. I reconnected the 105 chain with a KMC 10sp connector and I'm crossing my fingers. Bad luck? Something else to look for? It's annoying having to ride so gingerly. |
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#2
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2 broken 10sp chains in two weeks?
On Apr 28, 6:34*pm, Scott Gordo wrote:
I've got an Ultegra 6600 setup with FSA Gossamer cranks, all pretty much new (roughly 1000 miles so far.) First chain was a KMC DX10 which snapped a couple weeks ago. I'd hung the bike up wet and left it in a basement for a few weeks, and by the time I picked it up spots of rust were visible on the chain. I measured it for stretch but found none, lubed and cleaned it, but it snapped while in a lowish gear easing away from a stop light. I figured that I'd have to chalk it up to rust. I picked up a new Shimano 105 chain, removed extra links, used their rivet to connect, checked it for stiff links, but that chain also snapped after maybe 30 miles of easy use at one of the regular rivets (not the installation one). Naturally, I checked the rings and cogs for anything seriously askew but couldn't find it. The derrailleur alignment looks pretty good. It's a 53/39 and 12-23 setup so there's no crazy gearing, and I maintain as straightish a chainline as reasonably possible. In all, the drivetrain runs pretty smoothly. I reconnected the 105 chain with a KMC 10sp connector and I'm crossing my fingers. Bad luck? Something else to look for? It's annoying having to ride so gingerly. I just snapped a new-ish 6600 chain the other day. One of the side plates snapped at a rivet. Not an installation rivet. I replaced with a KMC SL10 chain. Nice crisp shifts. As for rust, my previous 6600 chain routinely had rust spots after just one day of sitting wet. Didn't seem to affect things. I replaced it due to stretch (wear). It's a fluke. Don't let it make you ride gingerly. Joseph |
#3
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2 broken 10sp chains in two weeks?
Joseph Santaniello wrote:
I've got an Ultegra 6600 setup with FSA Gossamer cranks, all pretty much new (roughly 1000 miles so far.) First chain was a KMC DX10 which snapped a couple weeks ago. I'd hung the bike up wet and left it in a basement for a few weeks, and by the time I picked it up spots of rust were visible on the chain. I measured it for stretch but found none, lubed and cleaned it, but it snapped while in a lowish gear easing away from a stop light. I figured that I'd have to chalk it up to rust. I picked up a new Shimano 105 chain, removed extra links, used their rivet to connect, checked it for stiff links, but that chain also snapped after maybe 30 miles of easy use at one of the regular rivets (not the installation one). Naturally, I checked the rings and cogs for anything seriously askew but couldn't find it. The derailleur alignment looks pretty good. It's a 53/39 and 12-23 setup so there's no crazy gearing, and I maintain as straight a chainline as reasonably possible. In all, the drivetrain runs pretty smoothly. I reconnected the 105 chain with a KMC 10sp connector and I'm crossing my fingers. Bad luck? Something else to look for? It's annoying having to ride so gingerly. I just snapped a new-ish 6600 chain the other day. One of the side plates snapped at a rivet. Not an installation rivet. I replaced with a KMC SL10 chain. Nice crisp shifts. As for rust, my previous 6600 chain routinely had rust spots after just one day of sitting wet. Didn't seem to affect things. I replaced it due to stretch (wear). It's a fluke. Don't let it make you ride gingerly. My experience with chain failure was with SRAM chains that were improperly heat treated, causing microscopic cracks in side plates where pins were pressed in during manufacture. I scrapped the whole lot of 10 chains after two failures after I was motivated to inspect a representative sample of side plates. The descriptions above didn't give me a clear idea of location and appearance of failures, In trying to attribute cause, I fall back on my only experience with chain failure. Others have reported side plates separating from the ends of pins which can be attributed to broaching by sharp edged chain pins that were re-used. Jobst Brandt |
#4
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2 broken 10sp chains in two weeks?
On Apr 28, 9:34*am, Scott Gordo wrote:
I've got an Ultegra 6600 setup with FSA Gossamer cranks, all pretty much new (roughly 1000 miles so far.) First chain was a KMC DX10 which snapped a couple weeks ago. I'd hung the bike up wet and left it in a basement for a few weeks, and by the time I picked it up spots of rust were visible on the chain. I measured it for stretch but found none, lubed and cleaned it, but it snapped while in a lowish gear easing away from a stop light. I figured that I'd have to chalk it up to rust. I picked up a new Shimano 105 chain, removed extra links, used their rivet to connect, checked it for stiff links, but that chain also snapped after maybe 30 miles of easy use at one of the regular rivets (not the installation one). Naturally, I checked the rings and cogs for anything seriously askew but couldn't find it. The derrailleur alignment looks pretty good. It's a 53/39 and 12-23 setup so there's no crazy gearing, and I maintain as straightish a chainline as reasonably possible. In all, the drivetrain runs pretty smoothly. I reconnected the 105 chain with a KMC 10sp connector and I'm crossing my fingers. Bad luck? Something else to look for? It's annoying having to ride so gingerly. I can't imagine anything about your set up that would account for the failure of two different brands of chain -- unless you are dropping them between your crank and BB or bending the hell ouf of them shifting somehow. I could imagine a big side load popping a link plate off a pin. Do you have bent link plates? It certainly is not rust -- if it were, I would break a chain a week. -- Jay Beattie. |
#5
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2 broken 10sp chains in two weeks?
On Apr 28, 9:05*pm, Jay Beattie wrote:
On Apr 28, 9:34*am, Scott Gordo wrote: I've got an Ultegra 6600 setup with FSA Gossamer cranks, all pretty much new (roughly 1000 miles so far.) First chain was a KMC DX10 which snapped a couple weeks ago. I'd hung the bike up wet and left it in a basement for a few weeks, and by the time I picked it up spots of rust were visible on the chain. I measured it for stretch but found none, lubed and cleaned it, but it snapped while in a lowish gear easing away from a stop light. I figured that I'd have to chalk it up to rust. I picked up a new Shimano 105 chain, removed extra links, used their rivet to connect, checked it for stiff links, but that chain also snapped after maybe 30 miles of easy use at one of the regular rivets (not the installation one). Naturally, I checked the rings and cogs for anything seriously askew but couldn't find it. The derrailleur alignment looks pretty good. It's a 53/39 and 12-23 setup so there's no crazy gearing, and I maintain as straightish a chainline as reasonably possible. In all, the drivetrain runs pretty smoothly. I reconnected the 105 chain with a KMC 10sp connector and I'm crossing my fingers. Bad luck? Something else to look for? It's annoying having to ride so gingerly. I can't imagine anything about your set up that would account for the failure of two different brands of chain -- unless you are dropping them between your crank and BB or bending the hell ouf of them shifting somehow. *I could imagine a big side *load popping a link plate off a pin. Do you have bent link plates? *It certainly is not rust -- if it were, I would break a chain a week. -- Jay Beattie.- Hide quoted text - - Show quoted text - Not sure what it could be. I should say that my shifting has become increasingly sloppy as well. I can't see what's not lining up, but the chain skips around in the 19-23 cogs. I even swallowed my pride and brought it to my LBS to have him go through it. He added a small shim to the back of the cassette, readjusted the limits, and ran through the shifting. I left relieved and feeling great until the chain started trying to pop out of gear again. I was in the saddle applying light to normal pressure. Like the pirate says, this is driving me nuts. The frame feels nice and solid and the der hanger is straight. I've checked and re-checked the stays and welds for hairline cracks. Like I mentioned in the original post, this drivetrain is pretty much new. I'd hate to start buying new parts for the sake of experimentation.... Grrr.... |
#6
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2 broken 10sp chains in two weeks?
On May 1, 7:28*am, Scott Gordo wrote:
Not sure what it could be. I should say that my shifting has become increasingly sloppy as well. I can't see what's not lining up, but the chain skips around in the 19-23 cogs. I even swallowed my pride and brought it to my LBS to have him go through it. He added a small shim to the back of the cassette, readjusted the limits, and ran through the shifting. I left relieved and feeling great until the chain started trying to pop out of gear again. I was in the saddle applying light to normal pressure. Like the pirate says, this is driving me nuts. The frame feels nice and solid and the der hanger is straight. I've checked and re-checked the stays and welds for hairline cracks. Like I mentioned in the original post, this drivetrain is pretty much new. I'd hate to start buying new parts for the sake of experimentation.... Grrr.... You don't need to buy new parts, you need to find out why the chain is skipping. Stiff or damaged link? Derailleur too close to cogs? Something like that. Ben |
#7
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2 broken 10sp chains in two weeks?
On May 1, 12:51*pm, "
wrote: On May 1, 7:28*am, Scott Gordo wrote: Not sure what it could be. I should say that my shifting has become increasingly sloppy as well. I can't see what's not lining up, but the chain skips around in the 19-23 cogs. I even swallowed my pride and brought it to my LBS to have him go through it. He added a small shim to the back of the cassette, readjusted the limits, and ran through the shifting. I left relieved and feeling great until the chain started trying to pop out of gear again. I was in the saddle applying light to normal pressure. Like the pirate says, this is driving me nuts. The frame feels nice and solid and the der hanger is straight. I've checked and re-checked the stays and welds for hairline cracks. Like I mentioned in the original post, this drivetrain is pretty much new. I'd hate to start buying new parts for the sake of experimentation.... Grrr.... You don't need to buy new parts, you need to find out why the chain is skipping. *Stiff or damaged link? Derailleur too close to cogs? *Something like that. Ben- Hide quoted text - - Show quoted text - You're right. Sorry about getting whinge-y. This whole thing is driving me to drink. I need to take a step back. |
#8
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2 broken 10sp chains in two weeks?
In article
, Scott Gordo wrote: On May 1, 12:51*pm, " wrote: On May 1, 7:28*am, Scott Gordo wrote: Not sure what it could be. I should say that my shifting has become increasingly sloppy as well. I can't see what's not lining up, but the chain skips around in the 19-23 cogs. I even swallowed my pride and brought it to my LBS to have him go through it. He added a small shim to the back of the cassette, readjusted the limits, and ran through the shifting. I left relieved and feeling great until the chain started trying to pop out of gear again. I was in the saddle applying light to normal pressure. Like the pirate says, this is driving me nuts. The frame feels nice and solid and the der hanger is straight. I've checked and re-checked the stays and welds for hairline cracks. Like I mentioned in the original post, this drivetrain is pretty much new. I'd hate to start buying new parts for the sake of experimentation.... Grrr.... You don't need to buy new parts, you need to find out why the chain is skipping. *Stiff or damaged link? Derailleur too close to cogs? *Something like that. Ben- Hide quoted text - - Show quoted text - You're right. Sorry about getting whinge-y. This whole thing is driving me to drink. I need to take a step back. .... and have a drink. Bent teeth? Did you measure the chain pitch? Did you put a new chain on a worn cassette? -- Michael Press |
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