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Shimano Ultegra Di2 Rear Derailleur

Service Pages

Shimano Service Page

Manuals

Rear Derailleur (Di2) Shimano Ultegra R8050 series

Tools

3 mm Hex Wrench

#2 Phillips screwdriver

T10 Torx Wrench

5 mm Hex Wrench

Torque Values

Warning: Incorrect tightening of bicycle components can lead to damage, accident, injury, or even death. The accuracy of provided values is not guaranteed; always check directly with the manufacturer.
Bolt Name Tool Torque (Nm)
Tension pulley 2.5 - 5
Guide pulley 2.5 - 5
Bracket axle (direct mount type) 8.0 - 10
Rear derailleur fixing screw 8.0 - 10
Plate stopper pin 1.0 - 1.1
Stopper bolt 1
Plate tension spring retaining screw 0.9 - 1.2

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