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Need help adjusting my front derailleur

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Need help adjusting my front derailleur

Old 01-17-21, 05:32 PM
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Need help adjusting my front derailleur

Hey folks,

I've got a road bike with Ultegra.

My front derailleur was having trouble switching into the large chainring, so I adjusted it using the barrel adjuster on my down tube.

It shifts just great while it's up on my repair stand.

But as soon as I ride it, it stops working.

I put it back up on my stand, works great.

Ride it, won't respond.

I've lost count of how many times I've done this.

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Old 01-17-21, 05:38 PM
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Go here https://si.shimano.com/#/ find your derailleur and follow the instructions in order.
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Old 01-17-21, 09:54 PM
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You can't be that far off. What's your cadence when you ride it? Are you pedaling along at 30rpm trying to pay attention to how well you adjusted your derailleur?
ETA: You also failed to mention which Ultegra...that might make a difference.
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Old 01-17-21, 11:26 PM
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Could use some pictures of your derailer. Also a description of how you are shifting. What position or gear you are in when you shift. How fast you are pedalling... ect.
No matter where your at... There you are... Δf:=f(1/2)-f(-1/2)
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Old 01-18-21, 06:17 AM
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Make sure the cable is routed correctly. Sometimes an incorrectly routed cable will shift fine / adequately on the stand but crappy under load.
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