How to Repair a Shimano Ultegra Shifter

Written by donivan gillis
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Shimano cycling is one of the world's leaders in all things cycling and has been quoted as saying, "As mountain bikes continue to become more diverse, components must evolve." As with any other piece of equipment that people use on a regular basis, cyclists of all kinds will eventually be put in a position where their bike needs repair. Learning to do this on your own can be a cost-saving and rewarding venture. There are a few things you can do to repair your shifters, though if they fail, it is likely that your shifters will need to be replaced.

Skill level:
Moderately Easy

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Things you need

  • Allen wrenches
  • Screwdrivers
  • Lightweight oil

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    Align Your Derailleur

  1. 1

    Loosen the pinch bolt on your derailleur with an Allen wrench. Do not remove the bolt. Pedal your bicycle to allow the chain to shift to the smallest gears.

  2. 2

    Check the alignment of the rear derailleur over the smallest cogs on your gears. Tighten or loosen your high-limit screw, which is marked with an "H," to align the derailleur over the cog with a screwdriver.

  3. 3

    Check the alignment of the front derailleur over the smallest cog. Tighten or loosen the low-limit screw, which is marked with an "L," to align the derailleur with a screwdriver.

  4. 4

    Shift your front derailleur to the largest gear. Adjust the high-limit screw so that the derailleur is properly aligned using a screwdriver.

    Check Your Cable

  1. 1

    Remove the cable cap from your shifter with a screwdriver. Be careful with the cap, as they are usually plastic and can strip the threads very easily.

  2. 2

    Remove your shifter cable from the pinch bolt and the cable housings. Push the cable from the derailleur side until the head is available to grasped. Pull the cable through the shifters.

  3. 3

    Inspect your cable for any kinks, bends or fraying. Replace the cable if any of these are present.

    Check Your Cable Housings

  1. 1

    Remove the cable housings from their brackets.

  2. 2

    Inspect the cables for any kinks or blocks.

  3. 3

    Replace any cable housings that have damage on them. Put a drop of lightweight oil into any cable housings that will go back onto your bicycle.

Tips and warnings

  • If these steps do not work, it is very likely that your shifter will need to be replaced.

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