Do derailleur hangers get old? Mines a PITA.
I swapped on a new Deore 10 speed drive train this spring. I aligned the hanger and everything ran great. It may have taken a hit because at some point it was off and over shifted. I realigned the hanger and didn’t even have to adjust the derailleur. It over shifted again. I get the chain back on and in the stand it’s all perfect. Now it’s off again and needs alignment.
Is it possible the hanger is just done? Like it’s soft and won’t hold a position under normal use? This ones about 15 years old.
I have a new one on order so I’m hoping it will fix it. I’ve never had this problem before.
Posted Jun 15, 2021, 3:43 AM UTC
13
Hangers are made out of aluminum. Static, metal will not weaken significantly, not in our lifetime. If the hanger has been straightened a couple times, it will be weaker. Aluminum will bend once and retain some integrity, but bend it back and it will weaken greatly. Just shifitng shouldn't be enough to bend it, but if your adjustment was great enough, it could be weakened. Also, some hangers are just really shitty (Looking at you Trek). What is the bike?
This is what I have experienced to varying degrees, usually corresponding with age. I had one hanger that was so soft, I gave it about a 2mm (light) push on the alignment gauge and it kinda just squished off into 2 pieces. Replaced it (wheels mfg), tuned the derailleur, and it was fine.