Replacing the Derailleur Gears in a Bike

Replacing the Derailleur Gears in a Bike

 

The bike's derailleur gear was broken: 

Use a 3 mm ball-hex wrench (Allen wrench) to take the broken gear off:

The broken gear:

Bought new gears from Amazon:

Insalled gears:

 

 

 

 

 

 

 

 

 

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