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Front Derailleur problems (chain falls off inside)
I have an older style Durace crankset and front double derailleur. I
used the 9speed upgrade and everything works pretty well. However, sometimes when I'm pedalling hard, the rear cog is the 4th biggest gear and I change the front from the big to small, the chain falls off. I set the inner stop as far as possible without chain rub on the smallest gear settings but it still falls off. I put the fr. derailleur as low as it can go and still clearing the front teeth. It only happens sometimes but it's quite annoying because I'm usually climbing a hill and I can't keep pedalling so sometimes tip over as I try to unlock my cleats. Any other ideas for adjustments? Should I replace the front derailleur with a new 9 speed derailleur or are they the same? I'm thinking I should buy a 3rd eye chain watcher but not sure where to get one close to Palo Alto, CA. Please just post to the newsgroup for everyone to benefit. Thanks. |
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#2
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Front Derailleur problems (chain falls off inside)
Post to newsgroup wrote in message . ..
I have an older style Durace crankset and front double derailleur. I used the 9speed upgrade and everything works pretty well. However, sometimes when I'm pedalling hard, the rear cog is the 4th biggest gear and I change the front from the big to small, the chain falls off. I set the inner stop as far as possible without chain rub on the smallest gear settings but it still falls off. I put the fr. derailleur as low as it can go and still clearing the front teeth. It only happens sometimes but it's quite annoying because I'm usually climbing a hill and I can't keep pedalling so sometimes tip over as I try to unlock my cleats. Any other ideas for adjustments? Should I replace the front derailleur with a new 9 speed derailleur or are they the same? I'm thinking I should buy a 3rd eye chain watcher but not sure where to get one close to Palo Alto, CA. Please just post to the newsgroup for everyone to benefit. Thanks. I would recommend a Jump Stop from N-Gear. There is no better way to prevent dropped chains, IMHO. http://gvtc.com/~ngear/ A pleased customer, Matt |
#3
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Front Derailleur problems (chain falls off inside)
I had exactly the same problem and a cyclist with a lot of experience told
me to slow down the speed of pedalling when you are changing to the smaller chainring. That is don't try and keep up with the pedalling action. I haven't had a problem since. I also was usually going up an incline and had trouble getting feet out of the clips in time. "Post to newsgroup" wrote in message ... I have an older style Durace crankset and front double derailleur. I used the 9speed upgrade and everything works pretty well. However, sometimes when I'm pedalling hard, the rear cog is the 4th biggest gear and I change the front from the big to small, the chain falls off. I set the inner stop as far as possible without chain rub on the smallest gear settings but it still falls off. I put the fr. derailleur as low as it can go and still clearing the front teeth. It only happens sometimes but it's quite annoying because I'm usually climbing a hill and I can't keep pedalling so sometimes tip over as I try to unlock my cleats. Any other ideas for adjustments? Should I replace the front derailleur with a new 9 speed derailleur or are they the same? I'm thinking I should buy a 3rd eye chain watcher but not sure where to get one close to Palo Alto, CA. Please just post to the newsgroup for everyone to benefit. Thanks. |
#4
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Front Derailleur problems (chain falls off inside)
"Post to newsgroup" wrote in message
... I have an older style Durace crankset and front double derailleur. I used the 9speed upgrade and everything works pretty well. However, sometimes when I'm pedalling hard, the rear cog is the 4th biggest gear and I change the front from the big to small, the chain falls off. I set the inner stop as far as possible without chain rub on the smallest gear settings but it still falls off. I put the fr. derailleur as low as it can go and still clearing the front teeth. It only happens sometimes but it's quite annoying because I'm usually climbing a hill and I can't keep pedalling so sometimes tip over as I try to unlock my cleats. Any other ideas for adjustments? Should I replace the front derailleur with a new 9 speed derailleur or are they the same? I'm thinking I should buy a 3rd eye chain watcher but not sure where to get one close to Palo Alto, CA. Please just post to the newsgroup for everyone to benefit. Thanks. I suggest either a Deda Dog Fang http://cambriabike.com/chain&guide/chains.htm or a Third Eye Chain Watcher http://www.product-finder.net/icycle...n-Watcher.html . The Third Eye Chain Watcher ($9.50) is adjustable for almost any seat tube. The Dog Fang is available in various sizes, looks cleaner, but is slightly more expensive ($12). Both of these are indispensable on any double or triple. Ever since I dropped my chain at the start of the finish hill in the District Road Race, I've used a Third Eye on all of my racing bikes. Vol(never drop a chain again)taire |
#5
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Front Derailleur problems (chain falls off inside)
"Voltaire" wrote in message ... "Post to newsgroup" wrote in message ... I have an older style Durace crankset and front double derailleur. I used the 9speed upgrade and everything works pretty well. However, sometimes when I'm pedalling hard, the rear cog is the 4th biggest gear and I change the front from the big to small, the chain falls off. I set the inner stop as far as possible without chain rub on the smallest gear settings but it still falls off. I put the fr. derailleur as low as it can go and still clearing the front teeth. It only happens sometimes but it's quite annoying because I'm usually climbing a hill and I can't keep pedalling so sometimes tip over as I try to unlock my cleats. Any other ideas for adjustments? Should I replace the front derailleur with a new 9 speed derailleur or are they the same? I'm thinking I should buy a 3rd eye chain watcher but not sure where to get one close to Palo Alto, CA. Please just post to the newsgroup for everyone to benefit. Thanks. I suggest either a Deda Dog Fang http://cambriabike.com/chain&guide/chains.htm or a Third Eye Chain Watcher http://www.product-finder.net/icycle...n-Watcher.html . The Third Eye Chain Watcher ($9.50) is adjustable for almost any seat tube. The Dog Fang is available in various sizes, looks cleaner, but is slightly more expensive ($12). Both of these are indispensable on any double or triple. Ever since I dropped my chain at the start of the finish hill in the District Road Race, I've used a Third Eye on all of my racing bikes. Vol(never drop a chain again)taire Agreed. This is probably the best solution, and maybe the only one. I can personally vouch for the Chain Watcher. It works seamlessly. No one seems to be able to pinpoint the cause of this problem, but it's endemic to all Shimano drivetrains, and almost unheard of with Campy. The best explanation I've heard is that Shimano's chainrings release the chain too suddenly. The old "SG" style Shimano chainrings, which have gates but no ramps or pins, seem to be the most prone. I once had this problem with an old mountain bike, but it stopped when I switched to a generic chainring in the middle position. Anyway, put on a Chain Watcher or similar device, and your problem will be solved. Matt O. |
#6
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Front Derailleur problems (chain falls off inside)
Post to newsgroup wrote in message . ..
I have an older style Durace crankset and front double derailleur. I used the 9speed upgrade and everything works pretty well. However, sometimes when I'm pedalling hard, the rear cog is the 4th biggest gear and I change the front from the big to small, the chain falls off. I set the inner stop as far as possible without chain rub on the smallest gear settings but it still falls off. I put the fr. derailleur as low as it can go and still clearing the front teeth. It only happens sometimes but it's quite annoying because I'm usually climbing a hill and I can't keep pedalling so sometimes tip over as I try to unlock my cleats. Any other ideas for adjustments? Should I replace the front derailleur with a new 9 speed derailleur or are they the same? I'm thinking I should buy a 3rd eye chain watcher but not sure where to get one close to Palo Alto, CA. Please just post to the newsgroup for everyone to benefit. Thanks. Dear Nospam, Try calling Performance Bicycles at 800-727-2433 if California is out of chain watchers. They take checks if your internet fears extend to credit cards. The chain still comes off, but can usually be pulled back into place with a friction shifter--I can't speak for brifters. You might search for a recent thread about the "Deda Dog Fang," another brand. Carl Fogel |
#7
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Front Derailleur problems (chain falls off inside)
Post to newsgroup wrote:
I have an older style Durace crankset and front double derailleur. I used the 9speed upgrade and everything works pretty well. However, sometimes when I'm pedalling hard, the rear cog is the 4th biggest gear and I change the front from the big to small, the chain falls off. Is your chain the right length? When I bought my current bike I had trouble with the chain falling off to the inside. After lots of grief and way too many visits to the LBS they finally figured out that the chain was too long. They removed a couple links, and I haven't had a problem since. -- Ray Heindl (remove the X to reply) |
#8
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Front Derailleur problems (chain falls off inside)
"Matt O'Toole" wrote in message news:kKSlb.34647
No one seems to be able to pinpoint the cause of this problem, but it's endemic to all Shimano drivetrains, and almost unheard of with Campy. That's not my experience and observation. I would even say that chain watchers are mandatory for that brand while just a precaution for the other. |
#9
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Front Derailleur problems (chain falls off inside)
"Matt O'Toole" wrote in message .. .
No one seems to be able to pinpoint the cause of this problem, but it's endemic to all Shimano drivetrains, and almost unheard of with Campy. The best explanation I've heard is that Shimano's chainrings release the chain too suddenly. The old "SG" style Shimano chainrings, which have gates but no ramps or pins, seem to be the most prone. I once had this problem with an old mountain bike, but it stopped when I switched to a generic chainring in the middle position. Anyway, put on a Chain Watcher or similar device, and your problem will be solved. Matt O. I have the same problem with a Sora double crankset on my 12-speed French road bike. I'm using the matching Sora FD with it. I had been planning on getting a chain catcher, but then read that they were for triples. I appreciate a thread like this, where I can learn something. I'll be getting a Chain Watcher or Dog Fang. I'll have to see which one my LBS stocks. Thanks everyone, for the advice. Life is Good! Jeff |
#10
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Front Derailleur problems (chain falls off inside)
Any other ideas for adjustments? Should I replace the front
derailleur with a new 9 speed derailleur or are they the same? I'm thinking I should buy a 3rd eye chain watcher but not sure where to get one close to Palo Alto, CA. The 3rd-eye or Jump Stop are both excellent solutions, provided that your frame accepts them. We should have them in both of our stores (Redwood City and Los Altos); in Palo Alto, you might try Palo Alto Bicycles or Mike's Bikes. You mention that you've upgraded to 9-speed... was the prior equipment 8-speed? What's left of the 8-speed system? Yes, it's possible that the newer 9-speed front derailleur will keep it from shifting off, but it might not make any difference at all... mostly it will just shift a bit faster and match up with the detents for trimming a bit better. --Mike-- Chain Reaction Bicycles http://www.ChainReactionBicycles.com "Post to newsgroup" wrote in message ... I have an older style Durace crankset and front double derailleur. I used the 9speed upgrade and everything works pretty well. However, sometimes when I'm pedalling hard, the rear cog is the 4th biggest gear and I change the front from the big to small, the chain falls off. I set the inner stop as far as possible without chain rub on the smallest gear settings but it still falls off. I put the fr. derailleur as low as it can go and still clearing the front teeth. It only happens sometimes but it's quite annoying because I'm usually climbing a hill and I can't keep pedalling so sometimes tip over as I try to unlock my cleats. Any other ideas for adjustments? Should I replace the front derailleur with a new 9 speed derailleur or are they the same? I'm thinking I should buy a 3rd eye chain watcher but not sure where to get one close to Palo Alto, CA. Please just post to the newsgroup for everyone to benefit. Thanks. |
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