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Is inline barrel adjuster for front derailleur an ABSOLUTE must.

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Is inline barrel adjuster for front derailleur an ABSOLUTE must.

Old 07-26-19, 09:31 PM
  #1  
hcgaloi
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Is inline barrel adjuster for front derailleur an ABSOLUTE must.

I took a bike to an LBS for a front derailleur adjustment ( Dura Ace 9100). A mechanic took a look and said it didn’t have an inline barrel adjuster. He must install one before anything could be done. Anyway, I bought the bike at another LBS and that how it was setup. So, is it absolute necessary as claimed by the mechanic? Or, was it an up sell?

Thanks in advance

Last edited by hcgaloi; 07-26-19 at 09:41 PM. Reason: Added FD model
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Old 07-26-19, 10:14 PM
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No. With 9000 8000 and 7000 series there is tension adjustability built into the derailleur. An inline adjuster canít hurt but the derailleur can be set up and dialed in without one. I donít know if Iíd call it an upsell since installing an adjuster should only be a matter of a few dollars; more likely the mechanic isnt as familair with 9100 FDs as he should be.
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Old 07-26-19, 11:13 PM
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Per the instructions for a Shimano FD-9100 (https://si.shimano.com/pdfs/dm/DM-RAFD001-01-ENG.pdf), an inline barrel adjuster is not needed. The FD has a built-in "cable adjustment barrel" (see page 18). Interestingly enough though, the text says to adjust teh FD using that cable adjustment barrel or a cable adjuster on the frame (whcih would be your inline adjuster).
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Old 07-27-19, 12:39 AM
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I normally want to have an adjuster in the front that I can adjust while riding. Even when adjusting off the bike, but on the road, you might want to have an adjuster high up, so that you would not need to lean down over and over. My choice would be to to have an adjuster that sticks into the shifter, fom Ritchey or Jagwire.
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Old 07-27-19, 05:47 AM
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The adjuster should not any negative effects and as stated earlier it is a convenience. Kind of like chicken soup, it couldn't hurt.
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Old 07-27-19, 07:17 AM
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An inline adjuster would be a detriment on the DA9100 front derailleur. The adjustment for trim requires that the cable pull screw be used to align two marks on the FD. Using a inline barrel adjuster when the marks are not aligned will result in the derailleur trim being off. This mechanic has never set up the shifting on 9100, or at least not done it correctly.
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Old 07-27-19, 05:25 PM
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Originally Posted by ingo View Post
An inline adjuster would be a detriment on the DA9100 front derailleur. The adjustment for trim requires that the cable pull screw be used to align two marks on the FD. Using a inline barrel adjuster when the marks are not aligned will result in the derailleur trim being off. This mechanic has never set up the shifting on 9100, or at least not done it correctly.
I find that I have to have cable tension on my r8000 front derailleur just beyond where the two marks are perfectly aligned to get shifting and trim where I want it. I can achieve that via either the derailleur screw or the inline shifter (presence of which predates upgrade to r8000 derailleur). But the derailleur is paired with an older 6800 shifter so maybe that has some effect.When I had a 6800 FD I most definitely needed an inline adjuster. In any event, I can get shifting dialed in without too much trouble, and I hardly ever touch the inline shifter now that I can adjust cable tension at the derailleur. So yeah, the mechanicís advice was basically correct for older model shimano but wrong for 7000/8000/9000.
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Old 07-27-19, 06:07 PM
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I’m wary about this mechanic, and not sure I’d trust him with my bike:

1. As others have said, the new 7000/8000/9000 shimano absolutely does not need an inline adjuster.
2. Even on older stuff, while it was certainly *helpful* to have the adjuster, it wasn’t absolutely necessary. I set up 5800 on a bike without an inline adjuster, and had zero problems with it for thousands of miles.

My own experience with a R8000 FD: I followed the Shimano instructions VERY closely and lined up the lines just like they said, and I haven’t had to touch it in over 1000 miles. The trim works perfectly (all 22 gears accessible).
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Old 07-27-19, 06:11 PM
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Required: No
Nice to have and useful: Definitely
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Old 07-28-19, 07:49 AM
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Just an update, I took the bike to the original LBS where I bought it (longer drive). The mechanic said shift cables were stretched a tiny bit after initial setup. It took him a couple minutes to fine tune both front and rear derailleurs. He also concurred that 9100 FD has built-in cable tension adjuster, thus, inline ones wasn't needed.

The reason his shop doesn't install inline adjusters to newer Shimano FDs because sometimes they would unwound a little, and some clients had to bring the bike back for minor tightening. It was more hassle then it was worth.

Thanks everyone for your insights... Have fun riding... 8-)
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Old 07-30-19, 06:16 AM
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Originally Posted by DOS View Post
No. With 9000 8000 and 7000 series there is tension adjustability built into the derailleur...
^this. The built-in adjustment is really pretty slick, as are these FDs.
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