Thread A Chain On To A Rear Derailleur

Introduction

If the chain looks and sounds right then it's usually following the correct path on the rear derailleur. If you're uncertain about this, look carefully at the old chain's route before you take it off, take pictures or make a sketch.

Step 1

<h3>Step 1</h3><p>Hang the bike up or put it in a stand so the back wheel can turn.
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Off The Ground

Hang the bike up or put it in a stand so the back wheel can turn.

Step 2

<h3>Step 2</h3><p>If the rear derailleur has a cable connected select the highest gear. If the front derailleur has a cable connected select the lowest gear.
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Set The Gear on the front and rear derailleur

If the rear derailleur has a cable connected select the highest gear. If the front derailleur has a cable connected select the lowest gear.

Step 3

<h3>Step 3</h3><p>If one end of the chain has a pin sticking out, thread the other end through the system.
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Use The Small End

If one end of the chain has a pin sticking out, thread the other end through the system.

Step 4

<h3>Step 4</h3><p>Hang the ‘C’ hook near the end of the chain so it can’t pass through the rear derailleur.
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Insert The ‘C’ Hook

Hang the ‘C’ hook near the end of the chain so it can’t pass through the rear derailleur.

Pro Tip

Don’t let the chain drag on the floor. It will pick up dirt.

Step 5

<h3>Step 5</h3><p>Run the chain up behind the bottom jockey wheel of the rear derailleur.
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Start At The Back

Run the chain up behind the bottom jockey wheel of the rear derailleur.

Step 6

<h3>Step 6</h3><p>There may be a metal tab between the plates of the cage that holds the two jockey wheels, make sure the chain passes this without rubbing on it.
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Dodge The Tab

There may be a metal tab between the plates of the cage that holds the two jockey wheels, make sure the chain passes this without rubbing on it.

Step 7

<h3>Step 7</h3><p>Pass the chain up around the front of the top jockey wheel on the rear derailleur. 
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Top Jockey Wheel

Pass the chain up around the front of the top jockey wheel on the rear derailleur.

Step 8

<h3>Step 8</h3><p>Pass the chain up around the back of the smallest cog on the back wheel.
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Back Wheel

Pass the chain up around the back of the smallest cog on the back wheel.

Step 9

<h3>Step 9</h3><p>Engage the chain on the smallest cog on the back wheel and pull it through.
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Pull Through

Engage the chain on the smallest cog on the back wheel and pull it through.

Step 10

<h3>Step 10</h3><p>Pass the chain through the front derailleur cage and engage it on the small cog at the front.
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Front Derailleur

Pass the chain through the front derailleur cage and engage it on the small cog at the front.

Step 11

<h3>Step 11</h3><p>Turn the crank gently to pull the chain round the small cog at the front.
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Crank

Turn the crank gently to pull the chain round the small cog at the front.

Step 12

<h3>Step 12</h3><p>Connect the chain coming down the front of the small cog at the front to the ‘C’ hook in the other end of the chain. The chain is now ready to be connected.
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Hook Up

Connect the chain coming down the front of the small cog at the front to the ‘C’ hook in the other end of the chain. The chain is now ready to be connected.