How To Straighten Rear Derailleur Hanger. Once bent the derailleurs and pulleys are not going to align with the sprockets. You do want to make certain the allen is fully and firmly attached inside the derailleur bolt.
Can you straighten a bent derailleur. Once in place the allen wrench can be used as a lever. Whatever you do dont grab on to your derailleur and pull on it to straighten out the derailleur hanger.
Tighten the spanner over the hanger so that it covers the threaded hole and clamps the hanger snugly.
Get at the Derailleur with an Adjustable. Use this point on the rim as a constant reference when checking the hanger. Then twist the spanner gently until the hanger is back in line. Let the arm of the tool point straight down to a 6 oclock position.
