brucem76 Posted February 17, 2017 Share So as of late, my chain often slips off the large chainring to the outside when I'm freewheeling over bumpy ground. Even when in a middle gear on the RD. All shifting is working great, and while pedalling everything is solid. Why would the chain keep falling off in freewheel? Sent from my Redmi Note 3 using Tapatalk Link to comment Share on other sites More sharing options...
Meezo Posted February 17, 2017 Share open up the freebody its not engaging completely clean it up/out, regrease lightly, WIN! close mate had the same issue, changed his entire drivetrain, that time 1x10 to 1x11 turn out to be his freebody full of gunk, cleaned it up, problem solved, atleast he scored a 1x11 upgrade Link to comment Share on other sites More sharing options...
Bateleur1 Posted February 17, 2017 Share New training motivation ... you should not stop moving your legs On a more serious note, sounds like the tension on the chain might be a problem. The moment you stop pedalling the chain slacks as the DR does not keep the tension on the chain as suppose to. Link to comment Share on other sites More sharing options...
shaper Posted February 17, 2017 Share Chain length? Link to comment Share on other sites More sharing options...
Tatt Posted February 17, 2017 Share Clutch or no clutch? Link to comment Share on other sites More sharing options...
Hairy Posted February 17, 2017 Share Chain length?Agree with this, chain length sounds like the most likely culprit! Link to comment Share on other sites More sharing options...
brucem76 Posted February 18, 2017 Share No clutch. I recently added a link to chain because I went from 36t to 42t largest cog on the back, and jockey wheel was catching on largest cog even with B screw fully in Sent from my Redmi Note 3 using Tapatalk Link to comment Share on other sites More sharing options...
BaGearA Posted February 18, 2017 Share 1x or 2x ? Link to comment Share on other sites More sharing options...
brucem76 Posted February 18, 2017 Share 2x. Chain never comes off small chainring, only drops outside the large one Sent from my Redmi Note 3 using Tapatalk Link to comment Share on other sites More sharing options...
brucem76 Posted February 18, 2017 Share OK so I changed my chain back to original length. Now if the chain still falls off, it points to the B screw being fully screwed in leaving the derailleur in an unworkable position. I'll report back Sent from my Redmi Note 3 using Tapatalk Link to comment Share on other sites More sharing options...
BaGearA Posted February 18, 2017 Share 2x. Chain never comes off small chainring, only drops outside the large one Sent from my Redmi Note 3 using Tapatalkcheck your front chainring for wear Link to comment Share on other sites More sharing options...
brucem76 Posted February 18, 2017 Share check your front chainring for wearCan you tell anything from these bad photos? Sent from my Redmi Note 3 using Tapatalk Link to comment Share on other sites More sharing options...
BenReaper Posted February 18, 2017 Share All of the above mentioned are possibilities for your chain comming of, but as you mentioned that you have lengthened the chain and the problem started occurring since this change it might srem that your Jockey does not have enough tension to keep the chain tightly on the ring. Also look at the gap on the outside between your chain and the front derailleur when the chain is on the big ring and smallest in the rear, if this gap is too big the front derailleur won't be able to keep the chain in place. Lastly, what size is your small ring in the front, why did you opt to put a range extender on in the back instead of going smaller on the ring in the front? Link to comment Share on other sites More sharing options...
brucem76 Posted February 18, 2017 Share All of the above mentioned are possibilities for your chain comming of, but as you mentioned that you have lengthened the chain and the problem started occurring since this change it might srem that your Jockey does not have enough tension to keep the chain tightly on the ring. Also look at the gap on the outside between your chain and the front derailleur when the chain is on the big ring and smallest in the rear, if this gap is too big the front derailleur won't be able to keep the chain in place. Lastly, what size is your small ring in the front, why did you opt to put a range extender on in the back instead of going smaller on the ring in the front?Thanks. It's 24t on the front.... Sent from my Redmi Note 3 using Tapatalk Link to comment Share on other sites More sharing options...
BenReaper Posted February 18, 2017 Share I suspect you have a Shimano derailleur and according to Shimano they do not advise going bigger than a 36tooth on the cassette as the body of the derailleur is not long enough to accommodate a bigger ring. Replacing the B-screw to accommodate a bigger ring is a modification and it works to an extent, but like most modifications it will give you difficulties somewhere. Hence me asking the size of the small chainring, I would rather have changed the 24T to 22T ring first. I believe this will have been a cheaper option aswell. Link to comment Share on other sites More sharing options...
BaGearA Posted February 18, 2017 Share I suspect you have a Shimano derailleur and according to Shimano they do not advise going bigger than a 36tooth on the cassette as the body of the derailleur is not long enough to accommodate a bigger ring. Replacing the B-screw to accommodate a bigger ring is a modification and it works to an extent, but like most modifications it will give you difficulties somewhere. Hence me asking the size of the small chainring, I would rather have changed the 24T to 22T ring first. I believe this will have been a cheaper option aswell.Thinking the same. Another problem ( although it should not be) is that the limit on your big gear may be little to far out and even bringing it in may not solve the problem but its worth a try Link to comment Share on other sites More sharing options...
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