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Shimano XTR Di2 M9050 upgrade-kit 3-speed external battery (SM-BTR1 with SM-JC40 and SM-BMR2)

31815 / 2015

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  • Rear derailleurs
  • shift lever left
  • shift lever right
  • Display unit
  • Battery
  • Junction
  • Battery holder
  • Front derailleurs
  • Front derailleur band adaptor
In case that the groupset compilation above contains items that you don't need (e.g. crankset) then you must simply add the groupset to your basket and then visiting the shopping basket. There you can comfortably remove single items from the groupset. The price will be adjusted in realtime.
Optional items
Please pay attention: The price and availability claim above is related to the groupset items and not to the optional items; If you add some optional items you'll see the final price at the shopping basket.
  • Attention:
    • Shimano EW-SD50 Di2 must be ordered separately as they are not included in delivery. - Please measure your frame in case to determine the required wire lengths. - You can simply return wires if the ordered length is not correct or if you ordered more cables then necessary. - For this specific groupset configuration you need 4 wires.
    • If you want to learn more about possible groupset configurations or if you want to get an overview just have a look at page 15 to 17 from this document.


    Rediscover control. Rediscover efficiency. Discover Di2.

    Shimano's XTR M9050 Di2 shifting system brings the seamless control and instant response that only digital shifting can provide to the M9000 Rhythm Step drivetrain. This ushers in the digital age for mountain bikers, giving them control over their ride experience, no matter their discipline, like never before.

    Pairing Di2 with close gear steps means that shifting becomes a reflex. Decreased shift effort and superior ergonomics allow you to shift without decreasing your grip on the handlebar, keeping you in perfect control of both your bicycle and your effort. Your on-bike readiness will reach new heights with XTR Di2. As soon as the thought of a shift springs to mind, you can instantaneously react.

    The programmable, customizable, expandable E-tube Di2 platform brings a quantum leap in personalization to mountain biking. XTR Di2 is going to change the way you ride. How it changes is entirely up to you.



    Shimano's new XTR Di2 M9050 family features the optional Shimano Synchronized Shift, allowing for customizable synchronized front and rear shifting via a single FIREBOLT shifter. By simplifying the rider interface, shifting a mountain bike will have never felt so natural.

    The M9050 derailleurs communicate gear position and automatically execute front and rear shifts when a rider asks for a sequentially larger or smaller gear. This improves efficiency by minimizing time spent on smaller chainrings and cogs.

    Thanks to the programmable options with the Di2 platform, riders can choose when front shifts occur based on terrain and personal preferences. An audible alarm will warn of an upcoming front derailleur shift so that a rider can choose to remain in a given gear. Additionally, on a mountain bike with both front and rear FIREBOLT shifters installed, the rider can manually override shifts at any time, creating perfect cadence control. With Shimano Synchronized Shift your experience on a mountain bike has never been this intuitive, this personalized, this connected or this focused.


    This article cannot be shipped to countries outside of the European Union and all other countires of the European Free Trade Association (EFTA).
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    • Rear derailleur
    • Right/rear shifter + Left/front shifter
    • Display unit
    • Battery SM-BTR1 + battery holder BMR2
    • Junction JC40
    • Front derailleur + clamp adaptor
    • WITHOUT electrical wires
  • The following list shows the pre-configurated groupset list - you are able to remove single items at the shopping cart.
    Rear derailleursPicture Description
    • XTR Di2 RD-M9050 rear derailleur long cage [RD-M9050-SGS]IN STOCK (only 1 left in stock)
    • XTR Di2 RD-M9050 rear derailleur medium cage [RD-M9050-GS]IN STOCK (only 1 left in stock)
    shift lever leftPicture Description
    • XTR Di2 SW-M9050 shift lever leftIN STOCK
    shift lever rightPicture Description
    • XTR Di2 SW-M9050 shift lever rightIN STOCK (only few items left in stock)
    • XTR Di2 SC-M9050 display unitready for sending in 4-6 business days
    • Dura-Ace Di2 SM-BTR1 batteryready for sending in 1-3 business days
    • Dura-Ace/Ultegra Di2 SM-JC40 junction external routingon order (delivery date unknown)
    Battery holderPicture Description
    • SM-BMR2 battery holder screw M4x10 for external cable routing (short;10mm)IN STOCK (only 1 left in stock)
    • SM-BMR2 battery holder screw M4x10 for external cable routing (short;16mm)IN STOCK (only 1 left in stock)
    • SM-BMR2 battery holder screws M4 and cable binder for external cable routing (long)IN STOCK (only 1 left in stock)
    • SM-BMR2 battery holder screws M4 and cable binder for internal cable routing (long)IN STOCK (only 1 left in stock)
    Front derailleursPicture Description
    • XTR Di2 FD-M9050 front derailleur 3-speed DownSwingready for sending in 1-3 business days
    Front derailleur band adaptorPicture Description
    • XTR Di2 SM-FD905 FD adaptor for FD-M9050/FD-M9070 bottom bracket mountingready for sending in 1-3 business days
    • XTR Di2 SM-FD905 FD adaptor for FD-M9050/FD-M9070 clamp high hoch [34.9mm with adaptor 31.8/28.6mm]ready for sending in 1-3 business days
    • XTR Di2 SM-FD905 FD adaptor for FD-M9050/FD-M9070 clamp low [34.9mm with adaptor 31.8/28.6mm]ready for sending in 1-3 business days
    • XTR Di2 SM-FD905 FD adaptor for FD-M9050/FD-M9070 direct-mount seatstayready for sending in 1-3 business days
    Optional items
    you'll get those items for a better price in combination with a groupset
    Please pay attention: The price and availability claim above is related to the groupset items and not to the optional items; If you add some optional items you'll see the final price at the shopping basket.
    • XTR BR-M9000 Race disc brake I-Spec front
    • XTR BR-M9000 Race disc brake I-Spec rear
    • XTR BR-M9020 Trail disc brake I-Spec front
    • XTR BR-M9020 Trail disc brake I-Spec rear
    • XTR PD-M9000 SPD
    • XTR PD-M9020 Trail SPD
  • Show all items from Shimano