Einleitung
In order to have a safer biking experience, make sure your disk brake is properly replaced.
Werkzeuge
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            Gripping the rear derailleur, pull the arm back, away from the front of the bike. 
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            Notice how the derailleur becomes almost vertical in the second picture when compared to the first. 
 
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            There should be enough slack, in the chain, at this point to remove the tire from the bike. 
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            Remove the tire from the bike. 
 
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            Using the modular screw driver with a T25 bit, begin loosening and then removing the six 10mm-long screws. 
 
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                            Abschluss
                          
                          To reassemble your device, follow these instructions in reverse order.