Front derailleur over shift prevention alternatives?
03-06-19, 05:42 PM
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Front derailleur over shift prevention alternatives?
It seems that some cranks just dont have the ability to have a chain guard mounted to them & a bike that I am trying to help from throwing off its chain has a finicky front derailleur. It also doesnt help that the person that owns the bike might at times expose the derailleur to bumping it during transit. So instead of me adjusting it everytime that should occur, what kind of alternative part can I add to eliminate the chain from being thrown off due to an over extending shift of the front der that will not be hideously bulky?
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03-06-19, 06:58 PM
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Back in the day we would slightly bend in the forward tips of the cage. The inner plate tip would help get that chain up onto the large ring. The outer plate's tip would catch the chain before it fell off. Andy
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03-06-19, 08:18 PM
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I can forsee that becoming a rubbing issue if it were bumped out of alignment.
A crank sweep of some sort if it exists should be simple enough to keep things from happening. But i dont know if there is a such thing?
A crank sweep of some sort if it exists should be simple enough to keep things from happening. But i dont know if there is a such thing?
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03-06-19, 10:01 PM
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If it is so much trouble, get rid of the FD, and go with a 1X set up; using a narrow-wide chainring.
03-07-19, 01:40 PM
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Wickwerks makes a 2-sides chain watcher that really works. It catches overshifts and undershifts. https://wickwerks.com/products/senti...chain-catcher/
03-07-19, 03:19 PM
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I fitted a Bash guard outside the outer chainring of my touring bike's triple..
It also protected teeth which helped,
when I could not find the ramp to the underpass at some EU train stations , and my train was on a different track ,
and there was a stairway to drag loaded bike Down, one then Up another, , to get there..
.....
It also protected teeth which helped,
when I could not find the ramp to the underpass at some EU train stations , and my train was on a different track ,
and there was a stairway to drag loaded bike Down, one then Up another, , to get there..
.....
03-07-19, 06:03 PM
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03-07-19, 06:07 PM
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Wickwerks makes a 2-sides chain watcher that really works. It catches overshifts and undershifts. https://wickwerks.com/products/senti...chain-catcher/
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03-08-19, 11:54 AM
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one by ... bodged..
Just removing the 1st & 3rd chainring and fixing the FD over the remaining one is just time spent, not money.....
....
....
Last edited by fietsbob; 03-08-19 at 05:09 PM.
03-08-19, 04:45 PM
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Fiddling with it i i think it will be ok not tossing over the chain. All 3 crank gears shift nice.
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03-08-19, 06:18 PM
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Make sure the FD isn't too high. Shimano specs 1-3mm when the outer cage plate is directly over the big ring. I shoot for the low end of that range.
03-08-19, 07:46 PM
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