Rant that could be a rave.
This fucking part.
As near as I can figure it allows Shimano rear Derrs. to be used on different frame sizes and drive train configurations and attaches the Rear Derr. to the breakaway hanger.
So far I have twisted 2 of these fuckers while riding. 1st time was on the maiden ride and I chalked it up to an over-shift with a poorly adjusted drivetrain and steep climbing with a lot of pedal pressure.
The other day we were just about to start a descent on a pretty muddy trail that horses has been on in the past 24 hrs, it was kind of a mess and we discussed backtracking the 7 miles we had just come up. We started down and it was not as bad because it was starting to re-freeze. As we came into a corner the mud was deeper and I had to go off to a side to avoid a traffic jam. I rode over a branch about the diameter of a middle finger and heard it snap followed by that unmistakable sensation that if you continue to pedal you will begin ripping out spokes.
I stopped, dismounted and felt the rear wheel. It wouldn't free wheel. I looked for the stick and saw that the rear Derr. was pushed into the spokes and the part in the pic. was twisted. It was 4:45 with darkness at 6:00, 34 Deg. windy and I didn't have much finger feeling.
I eyeballed the hanger, gave it a stout twist and it straightened right back out to what looked close. I was able to get back on and descend and after a little ways attempt some pedal strokes. It wasn't perfect but it shifted and pedaled pretty well considering the mud.
In retrospect should I be pissed this piece of elegant engineering fails so easily?
Or pleased that it allows for a redundancy to the breakaway hanger. It is about $ 12.00 if I order online instead of $ 32.00 for a replacement hangar. It is also "probably" easier to replace in the field as long as you aren't freezing.
So, there!
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