How to Assemble a Derailer

Assembling and installing a derailleur on your bicycle may seem like a daunting task after taking a look at the machinery. But after getting to know the basics of the mechanism and understanding its purpose, it is a relatively easy process. Most commonly you will have to work with the rear derailleur. This derailleur serves two purposes on your bike: moving the chain between the rear sprockets and picking up the chain slack created when the bike is in a lower gear.

Things You'll Need

  • Rear derailleur
  • Allen wrench
  • Screwdriver
Show More

Instructions

    • 1

      Attach the derailleur assembly to the bicycle. There will be a hook up in the frame of the bicycle for you to attach the derailleur. Make sure the body of the derailleur is facing away from the bike as to not interfere with the rear sprockets.

    • 2

      Mount the shift cable to the derailleur.

    • 3

      Tighten the shift cable as taut as it will allow. This will keep the cable out of the way of the gears as well as allowing you to shift quickly and efficiently.

    • 4

      Position the chain through the derailleur. Run it first through the front sprocket and then run it over the rear sprocket and down through the derailleur linking it on all sprockets.

    • 5

      Connect chain and check for tension.