Front derailleur barrel adjuster stripped
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.
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.
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.
Originally Posted by kseavey
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.
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.