chain is jumping off: is it because...
11-06-09, 06:32 PM
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astrositupataphysicyclist
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chain is jumping off: is it because...
recently took off the useless (or really, unused) front derailleur (reducing my cx conversion to a 6-speed!), but last week, after two hard training days, the chain jumped off....and off again.....and again......would keeping the derailleur on (though cableless) keep the chain from slapping off or was that just some hard riding?
it's down to 2 days before my first race...i feel pretty prepared, but i am already at a disadvantage as it is with being a cx noob on a 1990 steel schwinn with minimal modifications (front rim is finally alloy and not steel!). it's actually working pretty good these last 3 weeks with the tires on. but it will suck if i have to stop and get that chain back on every other lap.
it's down to 2 days before my first race...i feel pretty prepared, but i am already at a disadvantage as it is with being a cx noob on a 1990 steel schwinn with minimal modifications (front rim is finally alloy and not steel!). it's actually working pretty good these last 3 weeks with the tires on. but it will suck if i have to stop and get that chain back on every other lap.
Last edited by UBUvelo; 11-06-09 at 06:52 PM.
11-06-09, 07:10 PM
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if your chain is too long that will defeat a lot of chain retention devices
11-06-09, 07:24 PM
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astrositupataphysicyclist
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but yeah, i guess i need to put my derailleur back on...cable is long gone...shouldn't really add any real weight back on...
of course, is it a matter of how i shift and keep pressure on the chain as i pedal?
11-07-09, 04:13 AM
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11-07-09, 06:58 AM
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i think the 3rd Eye chain watcher will work...for the price it can't hurt to try it. thanks.
11-07-09, 02:01 PM
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i would take a few links out of your chain before you go adding a bunch of stuff. A chain can look short enough without actually being short enough. It's less critical when you have your FD on, so you end up with a chain too long. Plus, assuming you took the big ring off, there's no need for the extra links that would allow it to go over that ring.
You may also want to adjust your chainline (as far as no weight/no money solutions go), but I bet too much chain is your issue--previous threads on this issue suggest that this is by far the most common problem.
You may also want to adjust your chainline (as far as no weight/no money solutions go), but I bet too much chain is your issue--previous threads on this issue suggest that this is by far the most common problem.
11-07-09, 06:29 PM
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11-07-09, 08:47 PM
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i would take a few links out of your chain before you go adding a bunch of stuff. A chain can look short enough without actually being short enough. It's less critical when you have your FD on, so you end up with a chain too long. Plus, assuming you took the big ring off, there's no need for the extra links that would allow it to go over that ring.
You may also want to adjust your chainline (as far as no weight/no money solutions go), but I bet too much chain is your issue--previous threads on this issue suggest that this is by far the most common problem.
You may also want to adjust your chainline (as far as no weight/no money solutions go), but I bet too much chain is your issue--previous threads on this issue suggest that this is by far the most common problem.
i'll have to look into this after the race...i have finagl'd 'shimano shark fin' for the time being used in a way it wasn't quite intended...LBS had nothing in stock but one of those in the bargain bin for $3....
