Results 1 to 38 of 38
  1. #1
    mtbr member
    Reputation: eurospek's Avatar
    Join Date
    Sep 2007
    Posts
    5,460

    Dropping chain issue.

    What are the main causes of dropped chains on the trail? The 05 Kona Stinky is mostly ridden by my brother (high school freshman), nothing extreme in terms of use. Lately he's been dropping the chain once or twice every time we go out. Sometimes never.

    Is the chain too long? Bad shifting? Would a BB-mounted Blackspire Stinger help resolve this issue?
    konahonzo

  2. #2
    meow meow
    Reputation: b-kul's Avatar
    Join Date
    Sep 2009
    Posts
    10,622
    could be a long chain, could be bad, shifting, could be worn drivetrain parts, could be jarring terrain, could be the unfortunate stick, could be backpedaling. probably a combo of some if not all. try shortening the chain and go from there.

  3. #3
    mtbr member
    Reputation: eurospek's Avatar
    Join Date
    Sep 2007
    Posts
    5,460
    Quote Originally Posted by b-kul
    could be a long chain, could be bad, shifting, could be worn drivetrain parts, could be jarring terrain, could be the unfortunate stick, could be backpedaling. probably a combo of some if not all. try shortening the chain and go from there.
    Thanks, I'll definitely try shortening the chain first. Definitely not a worn drivetrain, even though it may be a 2005 model, the bike looked mint when I bought it this summer, and it still does. The previous owner rarely rode saying it was too much bike for him in the midwest lol. As for jarring terrain, mostly it's singletrack.
    konahonzo

  4. #4
    meow meow
    Reputation: b-kul's Avatar
    Join Date
    Sep 2009
    Posts
    10,622
    well if the drivetrain is good i doubt its backpedaling. most likely culprit is a chain that is too long, improper shifting, and some unlucky bounces.

  5. #5
    mtbr member
    Reputation: fotu's Avatar
    Join Date
    Jan 2005
    Posts
    829
    If your chain is dropping for no reason, it is not likely any of those things listed. It is probably the f-derailer out of adjustment.

    Before you try to shorten the chain, and then rip you rear derailer off your bike cause your chain is too short, you need to make sure the front derailer is set up correctly. The plates should be parallel to the crank, a little above the largest gear, and you have to set the STOP SCREWS CORRECTLY!!! If you don't know how to do this, a local bike shop will probably charge you $15 to fix it.

  6. #6
    mtbr member
    Reputation: eurospek's Avatar
    Join Date
    Sep 2007
    Posts
    5,460
    Quote Originally Posted by fotu
    If your chain is dropping for no reason, it is not likely any of those things listed. It is probably the f-derailer out of adjustment.

    Before you try to shorten the chain, and then rip you rear derailer off your bike cause your chain is too short, you need to make sure the front derailer is set up correctly. The plates should be parallel to the crank, a little above the largest gear, and you have to set the STOP SCREWS CORRECTLY!!! If you don't know how to do this, a local bike shop will probably charge you $15 to fix it.
    Doubt it's that. Before he started riding, the bike was at the LBS for a $75 tune-up/overhaul.
    konahonzo

  7. #7
    mtbr member
    Reputation: fotu's Avatar
    Join Date
    Jan 2005
    Posts
    829
    If it just got tuned up the chain shouldn't be dropping. Take it back to the LBS and have them fix it.

  8. #8
    meow meow
    Reputation: b-kul's Avatar
    Join Date
    Sep 2009
    Posts
    10,622
    Quote Originally Posted by fotu
    If your chain is dropping for no reason, it is not likely any of those things listed. It is probably the f-derailer out of adjustment.

    Before you try to shorten the chain, and then rip you rear derailer off your bike cause your chain is too short, you need to make sure the front derailer is set up correctly. The plates should be parallel to the crank, a little above the largest gear, and you have to set the STOP SCREWS CORRECTLY!!! If you don't know how to do this, a local bike shop will probably charge you $15 to fix it.
    if the chain was dropping due to over/ under shifting up front it would be pretty apparent.

  9. #9
    mtbr member
    Reputation: fotu's Avatar
    Join Date
    Jan 2005
    Posts
    829
    Quote Originally Posted by b-kul
    if the chain was dropping due to over/ under shifting up front it would be pretty apparent.
    yeah, you would think that.

    Guess there is absolutely no way the front derailer is out of adjustment. I suppose the last (and first) resort is going to have to be to shorten the chain, and better buy a $100 dollar chain guide while you are at it, for good measure.

    and by the way, you are suggesting it could be "improper shifting". How is improper shifting a possible culprit, but a derailer out of tune isn't? What is improper shifting anyway?

  10. #10
    meow meow
    Reputation: b-kul's Avatar
    Join Date
    Sep 2009
    Posts
    10,622
    Quote Originally Posted by fotu
    yeah, you would think that.

    Guess there is absolutely no way the front derailer is out of adjustment. I suppose the last (and first) resort is going to have to be to shorten the chain, and better buy a $100 dollar chain guide while you are at it, for good measure.

    and by the way, you are suggesting it could be "improper shifting". How is improper shifting a possible culprit, but a derailer out of tune isn't? What is improper shifting anyway?
    do you post with the sole intention of starting fights and sounding stupid? if you overshoot your largest chainring because the fd moved out too far its rather obvious. the fd will quite plainly not be alligned with the largest ring. the same goes for under shifting. it doesnt take much for a chain to get bumped off, even if the terrain does not seem rough so shortening the chain is a good place to start provided the fd is adjusted adiquitly (as has been established). so before you go spouting off again why dont you try and learn a thing or two.

  11. #11
    mtbr member
    Reputation: fotu's Avatar
    Join Date
    Jan 2005
    Posts
    829
    Quote Originally Posted by b-kul
    do you post with the sole intention of starting fights and sounding stupid? if you overshoot your largest chainring because the fd moved out too far its rather obvious. the fd will quite plainly not be alligned with the largest ring. the same goes for under shifting. it doesnt take much for a chain to get bumped off, even if the terrain does not seem rough so shortening the chain is a good place to start provided the fd is adjusted adiquitly (as has been established). so before you go spouting off again why dont you try and learn a thing or two.
    What has been established? That he got a tune-up? Why don't you re-read through this thread, and then maybe take some of your own advice.

  12. #12
    meow meow
    Reputation: b-kul's Avatar
    Join Date
    Sep 2009
    Posts
    10,622
    Quote Originally Posted by fotu
    What has been established? That he got a tune-up? Why don't you re-read through this thread, and then maybe take some of your own advice.
    are you saying i should shorten my chain? and yes it was established he got a tune up, and provided the mechanic and op are at least semi companent the fd is not over shifting.

  13. #13
    mtbr member
    Reputation: fotu's Avatar
    Join Date
    Jan 2005
    Posts
    829
    Quote Originally Posted by b-kul
    are you saying i should shorten my chain? and yes it was established he got a tune up, and provided the mechanic and op are at least semi companent the fd is not over shifting.
    Sure, take out 2 or 3 links. While you're at it, I recommend you crank down on your headset top cap too.

  14. #14
    meow meow
    Reputation: b-kul's Avatar
    Join Date
    Sep 2009
    Posts
    10,622
    i suppose you can always to come on the internet to remind yourself idiocy and ignorance are still prevelant.

  15. #15
    mtbr member
    Reputation: fotu's Avatar
    Join Date
    Jan 2005
    Posts
    829
    Too true. That's the real reason why I keep posting on this forum--I am over 3,300 posts behind you. Although its going to be a lot of work and ignorance catching up to you, I think I am up to task.

    These past few weeks have been especially encouraging.

    Edit: Oops, that would be over 3,200 posts. See? I am getting better with my mathmication skillz 2.

  16. #16
    meow meow
    Reputation: b-kul's Avatar
    Join Date
    Sep 2009
    Posts
    10,622
    Quote Originally Posted by fotu
    Too true. That's the real reason why I keep posting on this forum--I am over 3,300 posts behind you. Although its going to be a lot of work and ignorance catching up to you, I think I am up to task.

    These past few weeks have been especially encouraging.

    Edit: Oops, that would be over 3,200 posts. See? I am getting better with my mathmication skillz 2.
    dont get discouraged, your stupidity is second to none and you are completly ignorant!

  17. #17
    Nouveau Retrogrouch SuperModerator
    Reputation: shiggy's Avatar
    Join Date
    Dec 1998
    Posts
    48,307
    Quote Originally Posted by eurospek
    Thanks, I'll definitely try shortening the chain first. Definitely not a worn drivetrain, even though it may be a 2005 model, the bike looked mint when I bought it this summer, and it still does. The previous owner rarely rode saying it was too much bike for him in the midwest lol. As for jarring terrain, mostly it's singletrack.
    * Could be a bent chainring tooth.
    * A bad chain. I have had a cheap chain drop constantly. Switched brands and it stopped with no other changes.
    * Using the big-big combo. Extreme chain angle when on the larger cogs and big ring can let the chain drop easily.

    Highly unlikely front derailleur has any affect on the issue.
    mtbtires.com
    The trouble with common sense is it is no longer common

  18. #18
    Beer Swilling Clyde
    Reputation: missoularider's Avatar
    Join Date
    Sep 2005
    Posts
    323
    Sweet chic fight! OP, I'd take the advise of the guy whose been around since 05 to the guy who just started riding a year ago, experience trumps info learned from reading, arm chair mechanics rarely get it right.

  19. #19
    meow meow
    Reputation: b-kul's Avatar
    Join Date
    Sep 2009
    Posts
    10,622
    Quote Originally Posted by missoularider
    Sweet chic fight! OP, I'd take the advise of the guy whose been around since 05 to the guy who just started riding a year ago, experience trumps info learned from reading, arm chair mechanics rarely get it right.
    turns out the new guy was right (see shiggy's post). dont see how only riding for a couple of years would make me less knowledgable about cause and fixes of dropped chains.

  20. #20
    Beer Swilling Clyde
    Reputation: missoularider's Avatar
    Join Date
    Sep 2005
    Posts
    323
    Yeah, I don't really know either. I'm just a fan of flame wars! The old school ones in the DH/FR forum always kept me entertained.

  21. #21
    mtbr member
    Reputation: fotu's Avatar
    Join Date
    Jan 2005
    Posts
    829
    Quote Originally Posted by b-kul
    turns out the new guy was right (see shiggy's post). dont see how only riding for a couple of years would make me less knowledgable about cause and fixes of dropped chains.
    Oh really? Is the bike fixed?

    Its funny how quick this got out of hand. I was just trying to help this guy out. Even at this point, the best thing this guy can do is take the bike to the shop that "tuned" it up, and have them dial it in. If he just spent $75 on a tune, it should be dialed. Even if he can diagnose the problem himself, which he can't, I would still suggest not even putting a wrench on it and have the shop that did the tune finish the job.

    However, if the bike has been crashed, or messed with by the OP or his little brother, the shop is not responsible. AND in that case anything, including the front derailer, could be an issue. The first step when diagnosing problems is to make sure everything is adjusted correctly. Then you start replacing crap. At the very least, never assume anything when diagnosing things, that includes bikes, cars, motos, whatever.

  22. #22
    mtbr member
    Reputation: eurospek's Avatar
    Join Date
    Sep 2007
    Posts
    5,460
    Quote Originally Posted by fotu
    Oh really? Is the bike fixed?

    Its funny how quick this got out of hand. I was just trying to help this guy out. Even at this point, the best thing this guy can do is take the bike to the shop that "tuned" it up, and have them dial it in. If he just spent $75 on a tune, it should be dialed. Even if he can diagnose the problem himself, which he can't, I would still suggest not even putting a wrench on it and have the shop that did the tune finish the job.

    However, if the bike has been crashed, or messed with by the OP or his little brother, the shop is not responsible. AND in that case anything, including the front derailer, could be an issue. The first step when diagnosing problems is to make sure everything is adjusted correctly. Then you start replacing crap. At the very least, never assume anything when diagnosing things, that includes bikes, cars, motos, whatever.
    That's the thing, it wasn't crashed nor messed with by either of us. Since the tune-up last summer, we went on maybe 5 rides or so, this was last summer. I doubt the LBS will look at it in the spring since so much time has passed. I would rather attempt to fix it myself before heading to the LBS.
    konahonzo

  23. #23
    meow meow
    Reputation: b-kul's Avatar
    Join Date
    Sep 2009
    Posts
    10,622
    Quote Originally Posted by fotu
    Oh really? Is the bike fixed?

    Its funny how quick this got out of hand. I was just trying to help this guy out. Even at this point, the best thing this guy can do is take the bike to the shop that "tuned" it up, and have them dial it in. If he just spent $75 on a tune, it should be dialed. Even if he can diagnose the problem himself, which he can't, I would still suggest not even putting a wrench on it and have the shop that did the tune finish the job.

    However, if the bike has been crashed, or messed with by the OP or his little brother, the shop is not responsible. AND in that case anything, including the front derailer, could be an issue. The first step when diagnosing problems is to make sure everything is adjusted correctly. Then you start replacing crap. At the very least, never assume anything when diagnosing things, that includes bikes, cars, motos, whatever.
    look, all i did was say if the fd was throwing the chain it would be apparent, i didnt even disagree with you, that could have been the problem. but for some reason you got all bent out of shape and tried to cut cut down all my valid suggestions.

  24. #24
    mtbr member
    Reputation: fotu's Avatar
    Join Date
    Jan 2005
    Posts
    829
    Quote Originally Posted by eurospek
    That's the thing, it wasn't crashed nor messed with by either of us. Since the tune-up last summer, we went on maybe 5 rides or so, this was last summer. I doubt the LBS will look at it in the spring since so much time has passed. I would rather attempt to fix it myself before heading to the LBS.
    In that case, I suggest you start with the easiest things first. Make sure everything is adjusted correctly.

    here, read this.

    http://www.sheldonbrown.com/derailer-adjustment.html

  25. #25
    mtbr member
    Reputation: fotu's Avatar
    Join Date
    Jan 2005
    Posts
    829
    Quote Originally Posted by b-kul
    look, all i did was say if the fd was throwing the chain it would be apparent, i didnt even disagree with you, that could have been the problem. but for some reason you got all bent out of shape and tried to cut cut down all my valid suggestions.
    Hey, it is great to go ahead and make suggestions, and working on you own bike is a truely wonderful experience. (Ahh...so warm, so nice!) I guess your suggestions are "valid" in that you made them, but I don't get the point of offering advice on something you clearly aren't that sure about. Maybe I'm wrong, and you are personally familiar with this bike. Otherwise, shortening the chain without knowing if the chain is in fact too long is really bad advice. But as the great, late Allen Sherman once said "Bad advice costs nothing, and its worth the price!" (I might be paraphrasing here).

  26. #26
    meow meow
    Reputation: b-kul's Avatar
    Join Date
    Sep 2009
    Posts
    10,622
    Quote Originally Posted by fotu
    Hey, it is great to go ahead and make suggestions, and working on you own bike is a truely wonderful experience. (Ahh...so warm, so nice!) I guess your suggestions are "valid" in that you made them, but I don't get the point of offering advice on something you clearly aren't that sure about. Maybe I'm wrong, and you are personally familiar with this bike. Otherwise, shortening the chain without knowing if the chain is in fact too long is really bad advice. But as the great, late Allen Sherman once said "Bad advice costs nothing, and its worth the price!"
    if you can recall the op specifically mentioned he thought the chain may be too long. maybe not, but im pretty confident he has seen pics of bikes correctly set up on the internet and would know if the chain was on the long side or the short side. i merely supported the op's idea that the chain maybe be too long thus bouncing off easily making shortening it a good suggestion. you seem to be assuming a) the op has no clue what he is doing and b) i have no clue what im talking about (which is funny since shiggy said what i said, but i suppose shiggy is a moron too). and you know what they say about assuming.

  27. #27
    mtbr member
    Reputation: fotu's Avatar
    Join Date
    Jan 2005
    Posts
    829
    Quote Originally Posted by b-kul
    if you can recall the op specifically mentioned he thought the chain may be too long. maybe not, but im pretty confident he has seen pics of bikes correctly set up on the internet and would know if the chain was on the long side or the short side. i merely supported the op's idea that the chain maybe be too long thus bouncing off easily making shortening it a good suggestion. you seem to be assuming a) the op has no clue what he is doing and b) i have no clue what im talking about (which is funny since shiggy said what i said, but i suppose shiggy is a moron too). and you know what they say about assuming.
    I DO know what they say. And I feel pretty confident this thread has made asses of us both. Or we have made asses of ourselves. Or something.

    BTW, how many posts do I need to make before newbies take my word as gospel?

  28. #28
    meow meow
    Reputation: b-kul's Avatar
    Join Date
    Sep 2009
    Posts
    10,622
    Quote Originally Posted by fotu
    I DO know what they say. And I feel pretty confident this thread has made asses of us both. Or we have made asses of ourselves. Or something.

    BTW, how many posts do I need to make before newbies take my word as gospel?
    probably. but then again i came in as an ass and instigator

    btw, you need probably 5k in posts. i apparently need 5 years.

  29. #29
    mtbr member
    Reputation: fotu's Avatar
    Join Date
    Jan 2005
    Posts
    829
    So, what's the story eurospek?

    Did you fix your bike?

  30. #30
    mtbr member
    Reputation: eurospek's Avatar
    Join Date
    Sep 2007
    Posts
    5,460
    No updates yet. Bikes in the garage, 20 degrees outside and snow.

    I'll update this thread soon enough when I'll attempt to fix when I can ride it outside in above freezing temps.
    konahonzo

  31. #31
    mtbr member
    Reputation: eurospek's Avatar
    Join Date
    Sep 2007
    Posts
    5,460
    Quote Originally Posted by fotu
    So, what's the story eurospek?

    Did you fix your bike?
    So I stopped by the LBS today that built my TransAM and the mechanic took a look and said this: the chain length is where it should be for a full suspension, along with proper der. alignment, and nothing's worn or out of the ordinary.

    He said I should look into getting a MRP LRP (or similar) double-ring chainguide. Time to look for a used one.
    konahonzo

  32. #32
    T.W.O
    Reputation: pfox90's Avatar
    Join Date
    Aug 2010
    Posts
    1,730
    Quote Originally Posted by eurospek
    So I stopped by the LBS today that built my TransAM and the mechanic took a look and said this: the chain length is where it should be for a full suspension, along with proper der. alignment, and nothing's worn or out of the ordinary.

    He said I should look into getting a MRP LRP (or similar) double-ring chainguide. Time to look for a used one.
    They had one on pricepoint a month or two ago for $50! I got one, and I'm sure they have sold out by now.

  33. #33
    #THELEGEND
    Reputation: Guy.Ford's Avatar
    Join Date
    Oct 2009
    Posts
    1,340
    Quote Originally Posted by eurospek
    So I stopped by the LBS today that built my TransAM and the mechanic took a look and said this: the chain length is where it should be for a full suspension, along with proper der. alignment, and nothing's worn or out of the ordinary.

    He said I should look into getting a MRP LRP (or similar) double-ring chainguide. Time to look for a used one.
    look for a Blackspire Stinger they are cheap and do the job pretty well. Personally I like the Blackspire Dewlie better, but Im cuckoo for cocoa puffs!

    Stinger @ Pricepoint.com

  34. #34
    mtbr member
    Reputation: eurospek's Avatar
    Join Date
    Sep 2007
    Posts
    5,460
    Quote Originally Posted by Guy.Ford
    look for a Blackspire Stinger they are cheap and do the job pretty well. Personally I like the Blackspire Dewlie better, but Im cuckoo for cocoa puffs!

    Stinger @ Pricepoint.com
    That's what I was thinking right off the bat. A BB mounted Stinger is like 20 bucks or so. I asked if that was fine, he said the MRP would be better.
    konahonzo

  35. #35
    #THELEGEND
    Reputation: Guy.Ford's Avatar
    Join Date
    Oct 2009
    Posts
    1,340
    Quote Originally Posted by eurospek
    That's what I was thinking right off the bat. A BB mounted Stinger is like 20 bucks or so. I asked if that was fine, he said the MRP would be better.
    Meh get the stinger, its the same deal just without the bashguard and added cost.

    Sounds like someone was trying to sell you on a higher priced item, do they work on commission @ your LBS per chance.

  36. #36
    mtbr member
    Reputation: fotu's Avatar
    Join Date
    Jan 2005
    Posts
    829
    Quote Originally Posted by eurospek
    So I stopped by the LBS today that built my TransAM and the mechanic took a look and said this: the chain length is where it should be for a full suspension, along with proper der. alignment, and nothing's worn or out of the ordinary.

    He said I should look into getting a MRP LRP (or similar) double-ring chainguide. Time to look for a used one.
    If nothing is worn out, or out of the ordinary, your chain shouldn't be falling off just riding along. Just sayin.

  37. #37
    mtbr member
    Reputation:
    Join Date
    Jul 2009
    Posts
    139
    I have a theory on dropped chains. On some suspension designs there is chain growth as the suspension is compressed. As the suspension moves back into it's normally position after taking a hit the chain is left slack and the rear derailleur cannot react quickly enough to take up this slack causing the chain to fall off the crank gears every now and then. Now add some chain slap and multiple suspension hits and you can see why your chain may fall off once and awhile.

    K-Edge makes a great product called a chain catcher that will prevent the chain from falling off the crank gears. I installed one several months ago and my chain drop issues have gone away completely.

  38. #38
    mtbr member
    Reputation: eurospek's Avatar
    Join Date
    Sep 2007
    Posts
    5,460
    Quote Originally Posted by fotu
    If nothing is worn out, or out of the ordinary, your chain shouldn't be falling off just riding along. Just sayin.
    Ordered the Blackspire Stinger BB, going to get it installed at another joint. We'll see their second opinion.
    konahonzo

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •