Bicycle Rear Shifting Cable Replacement
Amanda and 3 other contributors
Last updated on May 12, 2026
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Introduction
Go to step 1 ↓In this guide, we are replacing the rear shifting cable on a bike with a friction-based shifter. This cable connects the shifter to the derailleur, allowing you to change gears without manually adjusting the chain on the rear cassette. Common signs that the cable needs replacement include general wear, fraying, or breakage. Exercise caution when handling the old cable, as the wires can be sharp and use the wire cutters carefully to avoid injury. Always ensure the bike is stable and consider wearing gloves to protect your hands.
What you need
Parts
Tools
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Adjust the friction shifter so that it is in the position of the hardest gear.
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Remove the cable from the securing bolt.
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Remove the old cable from the bike by pulling the cable away from the rear derailleur (toward the front wheel).
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Remove the old cable from the shifter cable eye by pushing the cable up from below.
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Pull the old cable up until it is completely removed from the shifter.
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Install the new cable into the shifter by threading it into the shifter cable eye.
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Pull the new cable completely through until the cable end is resting in the shifter's cable eye.
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Route the new cable back through the bicycle the same way the old cable was routed.
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Reinstall the cable housing in its guides if necessary and guide the cable through the rear derailleur cable eye.
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Pull the cable through completely.
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Ensure the cable is installed correctly underneath the cable securing bolt on the derailleur. It should be in the same place the old cable was secured.
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Pulling the cable taut, use the 9mm wrench to tighten the cable securing bolt to hand tightness.
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Use the pair of dykes to cut the new cable, leaving about an inch and a half of extra cable beyond the cable securing bolt.
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All that's left is to test the repair. Go for a ride and shift gears to see if the repair was successful. If tension in the cable is too loose, the friction shifter in step 1 can be pulled towards the rear wheel to increase tension.
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Team
UC Davis, Team 1-5, Morris Winter 2026 Member of UC Davis, Team 1-5, Morris Winter 2026
UCD-MORRIS-W26S1G5
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