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Old 08-20-06, 08:21 AM   #1
kseavey
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Front derailleur barrel adjuster stripped

Hi everyone,

I have a Felt F80 road bike (http://www.feltracing.com/06/06_bikes/f80/).

I noticed that the barrel adjuster for the front derailleur is at least partially stripped (black, male threads). I don't know if the female side (welded on the frame) has any damage.

What is the solution to the male-side threads being stripped? This seems easy to replace, as it is a small, black, removable knob-like thing. However, what if the female-side threads become stripped? Does this mean I need a new frame? Seems drastic.

I've noticed that some bike frames have the barrel adjuster, female side as a separate part of the frame, i.e., it screws onto the frame and is not welded on. I guess this would be easier to replace than fixing the one where it is welded onto the frame.

Any advice?

Thanks,
Kevin
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Old 08-20-06, 08:56 AM   #2
ridelugs
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two ideas,
1: get a new barrel adjuster from local shop, try to thread it in. if it goes, great...
2: this failing, the same local shop, if worth thier salt, have a thread tap the size of the "female" threads.
they can retap it, and reinstall a new adjuster. 20 bucks, maybe. failing all this, you can jam a new one in there, and install an "inline barrel adjuster", which work even better but are ugly and heavyish.
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Old 08-20-06, 09:15 AM   #3
HillRider 
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Quote:
Originally Posted by kseavey
Hi everyone,

I noticed that the barrel adjuster for the front derailleur is at least partially stripped (black, male threads). I don't know if the female side (welded on the frame) has any damage.

What is the solution to the male-side threads being stripped? This seems easy to replace, as it is a small, black, removable knob-like thing. However, what if the female-side threads become stripped? Does this mean I need a new frame? Seems drastic.

I've noticed that some bike frames have the barrel adjuster, female side as a separate part of the frame, i.e., it screws onto the frame and is not welded on. I guess this would be easier to replace than fixing the one where it is welded onto the frame.

Any advice? Thanks,
Kevin
New male adjusters should be easy to find. A stripped female adjuster would be a more difficult repair if the threads were badly damaged and couldn't be cleaned up eith a tap. You could fit the male adjuster with a nut and use it to adjust the length and the damaged female section would become just a slip-in mount. In-line cable adjusters work well as replacements even if they offend ridelugs sensibilities.

Frames, made during the downtube shifter era and during the transition from downtube to STI/Ergo shifters had shifter mount bosses welded/brazed/glued to the downtube and cable stops/adjusters bolted over these bosses. These were obviously replacable if damaged.

Newer frames, intended strictly for STI/Ergo shifters usually have the cable stops/adjusters fastened to the head tube as this makes for shorter housing runs and keeps the cables from rubbing on the head tube. These are a more permanant mount and more difficult to replace if damaged.

Now a question, how did the adjuster get damaged? They are a very lightly stressed item and should last forever.
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Old 08-20-06, 04:26 PM   #4
kseavey
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how it happened

The bike is a new one and I knew that I would need to adjust the cable tension.

So anyway, I was trying to turn the adjuster and it was really, really tight. It didn't help that I couldn't get a very good grip on it since it was essentially right next to the frame and was hot outside (i.e., hands sweaty). I think it was out a little ways (only the first three threads engaged), and I think I gave it too much side-to-side action while trying to unscrew it. When I finally got the thing out, I noticed that the first three threads were stripped on the male-side of the adjuster.

That got me to thinking... what if the female-side threads were damaged?... that's why I posted.

Inline adjuster is no problem - I just didn't want to have to replace the frame for what seemed to me such a small but tragic problem. I'm glad that you let me know of some reasonable options.

Thanks!
Kevin
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