How Much To Fix A Derailleur. Sight from behind the bike and see if the hanger looks parallel to the wheel and sprockets. You may be able to have the hanger straightened but I would put a new one on for the reasons rockcrusher gave.

Swapping out my front and rear derailleurs. Derailleurs per derailleur 20 labor for derailleur adjustment and lubrication. The derailleur is moved by tightening or relaxing the cable tension.
Cable Replacment - 20 labor for each cable replaced includes adjustment does not include cost of cable 5 Come visit us at AJs Bikes for all your Bike Repair Needs.
The derailleur is moved by tightening or relaxing the cable tension. If you take your MTB into a local bike shop the average price to replace a rear derailleur is going to be 110. If cable and housing needs to be replaced labor is 25 plus the cost of the cable and housing. The cassette runs 35 the chain 15 and a chainring is 40 on a older 9 x 3 Shimano Ultegra equipped bike.

