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Can't find barrel adjuster

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Can't find barrel adjuster

Old 06-16-19, 06:05 AM
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Can't find barrel adjuster

I have a Specialized Diverge A1 with a Shimano Claris and I'm having trouble figuring out where the barrel adjuster for the front or rear derailleur is.

I can see two likely places it could be but I can't turn either to adjust.

I wanted to attach some pictures showing where I think the barrel adjuster for the rear derailleur could be but I'm not allowed to yet. One is on the rear derailleur itself and the other is under the down tube.

Could anyone point out to me where I'm going wrong? Is there some way I need to turn them? Am I looking in the wrong places?

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Old 06-16-19, 06:19 AM
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The one on the rear derailleur is right where the cable enters the derailleur. Out front, there usually is none at the derailleur. It can be an inline adjuster (somewhere along the cable) or on the cable boss on the downtube.

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Old 06-16-19, 06:23 AM
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First, only try adjusting with a slack cable. On the rear, shift into your lowest gear, quit pedaling, then shift into your highest gear. This will give you maximum slack. On the front, it's opposite.

Often an adjuster will seize onto the housing end. When the cable is slack, try pulling the housing out of the adjuster and be sure this isn't happening.

Then try loosening the adjuster. It should be able to thread all the way out. Inspect the threads for corrosion and damage and repair as needed.
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Old 06-16-19, 09:23 AM
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It will be easier to adjust and less likely to strip/bind if you relieve the cable tension before making the adjustments. Same with derailleur limit screws; don't try to drive the screw against the spring, pull the der away from the screw, then turn it.
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Old 06-16-19, 01:49 PM
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functionally, on the repair stand, the back location lets me see what the adjustment changes..
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Old 06-17-19, 07:35 AM
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Welcome. If you google "bicycle part names" you will see lots of diagrams showing part names which can vary by manufacturer or source. The top tube adjuster might on some diagrams be identified as a "housing stop". Also searching for "derailleur adjustment" will find lots of help showing you how and why to turn the adjuster. The Park Tool website and Park Tool videos on You Tube would be good starting points.
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