How to adjust a rear derailleur

If you are thinking where my post about adjusting front derailleurs might be, it’s not. It’s not a thing anymore, well with mountain bikes. Road bikes will continue to use this antiquated technology until it finally arrives at the bitter end of a dark tunnel.

Step 1: Take your bike to your local bike shop.

If you are more persistent and have read on, then my instructions are below. You will find a video link attached in a few weeks.

  1. Make sure that the derailleur hanger is straight (if you don’t know what this is then repeat the above “step 1”)
  2. Disconnect the derailleur cable (for non-electric systems)
  3. Now dial in your high and low limits by physically pushing the derailleur to the low and high cogs; gently! Adjust your H and L screws so that the chain makes no strange or shifting sounds in those two cogs
  4. Back off all barrel adjusters associated with this system
  5. Attach your derailleur cable to the derailleur using the pinch bolt (gum or duct-tape attachments that work get a star) in the default (usually high) position (Hint: XTR, XT, XX1, X01 and similar derailleurs typically like a little cable slack, maybe 2mm from the tight position at the pinch bolt)
  6. Begin shifting while pedaling the system
  7. Make necessary barrel adjustments to adjust tension on the cable if the shift isn’t quite right
  8. Listen to each gear as the chain rides over it; no sounds should emanate that aren’t simply the normal chain and cog interface

I promise a video to explain all this and make it easier to follow. But for now if you’re desperate then just take it to a shop and pay the $15 to get it done right. 

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