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Shimano RD-M9050 XTR Di2 E-Tube Shadow + Direct Mount Compatible Rear Derailleur

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Product Description

Key Features:
  • Digital Integrated Intelligence or Di2: with programmed automatic motion at the touch of a switch the XTR M9050 Di2 rear derailleur is quick, smooth and effortless, making for unmatched drivetrain efficiency no matter what the riding conditions
  • Programmed automatic motion at the touch of a switch makes this derailleur quick, smooth and effortless to shift
  • The removal of traditional mechanical cables in favour of electrical wires not only eliminates poor shifting caused by contaminates, corrosion and stretching
  • Using Shimano's shadow plus technology and lowest profile to date, the M9050 will help you squeeze through the narrowest of trails without worry
  • Derailleur contains a saver (fuse) function, where the inner structure is protected from strong impacts
  • Synchro Shift compatible means both front and rear shifting can be done through the use of one shifter, which can be fully customized to suit your riding needs
  • Carbon fibre outer and Aluminium inner pulley plates are the perfect balance for weight saving and durability
  • Specifically designed to work with XTR M9000 11-speed Dyna-Sys 11-40T cassette and drivetrain
  • 11-speed E-tube Di2 compatible
  • Max low sprocket: 40T
  • Total capacity: 37T

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Derailleur/Mech Guide

What are derailleurs and mechs?

Derailleurs and mechs are two names for the same thing – the parts of your drive train that move the chain between chainrings for the front derailleur/mech and between the cassette cogs for the rear derailleur/mech.

Who needs a derailleur or mech?

Not all bikes have derailleurs, but if your bike has conventional gearing rather than singlespeed or hub gears, you will have at least a rear derailleur. These parts are exposed and somewhat vulnerable to damage, so you may need to replace them if this happens.

What are the choices?

Your choice will largely depend on what is compatible with the rest of your drivetrain, but there are different options for road and mountain bike, by the big three manufacturers, Shimano, SRAM and Campagnolo.

What should I buy with them?

If you’re replacing a front or rear mech, you may need to replace some other parts of your drivetrain as well, for compatibility or because you want them to wear together. These might include the chainrings, rear cassette or chain.

Anything else?

It’s not just compatibility with your other components you need to consider with a mech replacement. Derailleurs also have different fittings for various frame compatibilities, including braze-on fittings and a bolt-on collar.

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