Matching parts

Rear Derailleur riding the freewheel.  Photo by Michael McKinney

About a month ago, my rear derailleur started showing signs of wear.  It is an Ultegra 600 component I have been using reliably with my current configuration on a daily basis.  Granted, the riding is not extreme in distance or environment, (I'm not riding through front range blizzards, Afghanistan sand storms or Alaskan nights of the Midnight sun or anything), regardless, the derailleur has been running smoothly and without great trouble since resolving this particular issue, about a month ago - here's what happened.
If you notice the picture on the right, you'll see that the chain is slack, the cage of the derailleur is riding on the rear sprocket freewheel and something just seems wrong.  After correctly diagnosing that something was indeed wrong, (a few days of hearing the derailleur riding on the freewheel, locking the crank and chain when shifting and dropping the chain numerous times was enough to convince me something was indeed wrong), I proceeded to remove the chain, the rear derailleur and contact at least three or four better trained, more experienced peoples who might assist me in determining the correct course of action. 

Rear Derailleur.  Photo by Michael McKinney.

After having a couple of discussions with anonymous parties on Craigslist, where I have previously sought assistance in bicycle mechanics, I decided to have a professional look at it.  After a thorough check, he informed me that the derailleur was not actually mounted correctly, and was not functioning because the chain had stretched enough to adequately negate the efficacy of the incorrecly mounted component.  The part may have been working well, but since the chain had stretched enough, the component was now in need of a re-alignment, thankfully not replacement. 

Derailleur, proper.  Photo by Michael McKinney.

Rear Derailleur, improper. Photo by Michael McKinney.

Here are a couple of photos that illustrate what
he was referring to - notice the angle of the writing on
the derailleur.

After also replacing the chain and re-adjusting the derailleur into the correct configuration, which required some skillful manipulation of a tool not specifically suited for that task, the mechanic and I parted ways - myself happy I asked before making the problem worse.










In non-related news, I've gotten to working on a new sourdough recipe, with dried fruit, honey and a levain made from organic flour.  Here are some photos of that -

24 hour levain.  Photo by Michael McKinney

Rising bread.  Photo by Michael McKinney

Finished product.  Photo by Michael McKinney.