Set up 12-speed 105 Di2 and GRX Di2 Front Derailleur limits
Read how to set up your GRX/105 12-speed Di2 Front Derailleur - FD-RX825 / FD-R7150. You'll do so using the top(high) limit bolt and electric low limit.
Di2 Installation Guides
Installing Di2 is not that hard, but the documentation can be confusing at times. Use the filters below to find the guides you need, or just scroll down.
Front Derailleur
12-speed Front Derailleur installation and adjustment guide
No limit bolts on Dura-Ace/Ultegra: set the height, then the 0.5–1.0 mm outer and 0–0.5 mm inner gaps in the app. Covers 105 FD-R7150 and GRX FD-RX825 too.
Index Rear Derailleurs and set Front Derailleur limits using E-Tube Project
Micro-adjust the rear derailleur and set front derailleur limits in E-Tube Project, for one-bolt (R8050, R9150, RX815, 12-speed 105/GRX) and two-bolt FDs.
Installation Guide: GRX FD-RX815 / Ultegra FD-R8050 / DURA-ACE FD-R9150 Di2 Front Derailleur
Bought a new Di2 derailleur or have to replace your old one? Read FD-rx815 / FD-R8150 / FD-R9150 Di2 Front Derailleur installation instructions here.
Installation Guide: Ultegra FD-6870 / DURA-ACE FD-9070 Di2 Front Derailleur
Bought a new Di2 derailleur or have to replace your old one? Read FD-6870 / FD-9070 Di2 Front Derailleur installation instructions here.
Set up Front Derailleur limits (FD-RX815, FD-R9150, FD-R8050)
Read how to set up your two-adjustment-bolt Di2 Front Derailleur (Ultegra FD-R8050, DURA-ACE FD-R9150, GRX FD-RX815)
Set up Front derailleur limits (two bolt derailleurs: 6770, 6780, 9070)
Read how to set up your two-adjustment-bolt Di2 Front Derailleur (Ultegra FD-6870, DURA-ACE FD-9070)
Understanding Di2 derailleur specifications
What total capacity, max front difference and top sprocket max mean, why a 43.5 mm road FD can't run a 51.8 mm MTB chain line, and hanger extenders.
Rear Derailleur
1x12 MTB / Gravel Rear Derailleur installation and adjustment guide
This 2026 guide helsp you set up your 1x12 Di2 rear derailleur. We'll set the limits, micro-adjustment, and B-gap.
Pair 1x12 Wireless MTB / Gravel derailleurs and Shifters
Pairing 1x12 fully wireless Di2 MTB shifters and derailleurs can be done in two different ways. With the Shimano mobile app, and without.
12-speed Rear Derailleur installation and adjustment guide
Mount and wire the RD-R9250, RD-R8150, RD-R7150 or GRX RD-RX825, set the B-screw and limits, then fine-tune in adjustment mode (hold the button 2–5 s).
Adjust 12-speed Di2 rear derailleur shifting and limits
This page shows you how to set up your 12-speed rear derailleur B-screw, limits, and fine-tune the shifting using micro-adjust. The process is similar to that of the 10-speed and 12-speed rear derailleurs.
Index Rear Derailleurs and set Front Derailleur limits using E-Tube Project
Micro-adjust the rear derailleur and set front derailleur limits in E-Tube Project, for one-bolt (R8050, R9150, RX815, 12-speed 105/GRX) and two-bolt FDs.
Installation Guide: 10-speed and 11-speed Di2 road Rear Derailleur
Bought a new Di2 rear derailleur and need some help installing it? Read how to install the RD-R8050 / RD-R9150 / RD-6870 / RD-9070 Di2 rear derailleurs.
Micro-adjust your 11-speed Di2 MTB Rear Derailleur
Indexing Di2 rear derailleurs is done through micro-adjustment. The MTB Di2 rear derailleur process is slightly different from that of road RDs. Read how to set up your MTB rear derailleur and stop that chain rubbing noise.
Micro-adjust your 10-speed and 11-speed road bike Di2 rear derailleur
Enter adjustment mode, check the guide pulley gap, micro-adjust and set the high/low stopper bolts on R8050, R9150 and GRX RX815/RX817 rear derailleurs.
Installation Guide: RD-RX805 / RD-RX815 / RD-RX817 Di2 Rear Derailleur
Stuck installing your new Di2 rear derailleur? Read how to install the RD-RX805 / RD-RX815 / RD-RX817 Di2 rear derailleurs.
Understanding Di2 derailleur specifications
What total capacity, max front difference and top sprocket max mean, why a 43.5 mm road FD can't run a 51.8 mm MTB chain line, and hanger extenders.
Shift lever
Wired 12-Speed Di2: How & Why to Connect (2026)
Improve your battery life by 50%. Learn the step-by-step for wiring your 2x12-speed Di2 shifters and why. For both 12-speed rim and disc brake bikes!
Unpair 12-speed Wireless Di2 Shifters
Unpairing 12-speed Di2 wireless shift levers can be done using the mobile app or using the SM-PCE02 and E-Tube Project for Windows. This page describes both methods of unpairing wireless shifters.
Change your Di2 lever free stroke and reach
Do you have small hands? Or extra large hands? Read this page to figure out how to change your Shimano Di2 shift lever (or shifter) reach.
Pair 12-speed Wireless Di2 Shifters
Pairing 12-speed Di2 wireless shift levers can be done using the mobile app, wires, or using the SM-PCE02. This page describes how to pair via mobile phone, and E-Tube EW-SD300 wires.
Installation guide: Di2 wired shift levers
Learn how to install Di2 drop bar levers commonly used on Di2 road bikes or Di2 gravel bikes. This walks you through the process and lists useful tips.
Update the firmware on 12-speed Hydraulic Shift levers
Wireless ST-R9270, ST-R8170, ST-R7170 and GRX levers must be wired to update. What you need (a 1200–1600 mm EW-SD300 and EW-JC302/304) and the steps.
How to Replace Di2 Shifter Batteries (And Check Levels Fast)
Don't get stuck in one gear. Learn the 0.5s check and critical 11% warning riders miss - Step-by-step CR1632 swap for Dura-Ace, Ultegra, 105 and GRX
Satellite Shifter
Install 12-speed satellite shifters (SW-RS801)
This page explains how to install 12-speed EW-RS801 drops/tops/TT extension satellite shifters and how to wrap the handlebar tape around them.
Flat bar shifter
Pair 1x12 Wireless MTB / Gravel derailleurs and Shifters
Pairing 1x12 fully wireless Di2 MTB shifters and derailleurs can be done in two different ways. With the Shimano mobile app, and without.
Unpair 12-speed Wireless Di2 Shifters
Unpairing 12-speed Di2 wireless shift levers can be done using the mobile app or using the SM-PCE02 and E-Tube Project for Windows. This page describes both methods of unpairing wireless shifters.
Installation Guide: MTB Style Shifter (11-speed)
On this page I'll show you how to install a set of MTB shifting buttons on a bike. It's not hard, but there are a couple of things to think of when installing these.
Tool
Building a 12-speed // 11-speed Di2 bike
This page links to the relevant sections on building 11-speed and 12-speed Di2 road and time-trial bikes.
Crankset
Installing a new chain - length and direction
Shimano chains are directional: the side with the text faces out. Plus QUICK-LINK safety and how many links to add for road, GRX and 12-speed MTB bikes
Installation Guide: Shimano Power Meter Crankset
Bought a new Shimano FC-R9100 Power Meter? This guide walks you through installing it. It's not complicated and should take less than half an hour.
Battery
Building a 12-speed // 11-speed Di2 bike
This page links to the relevant sections on building 11-speed and 12-speed Di2 road and time-trial bikes.
Install the Di2 battery in the fork steerer
Where do you install your Di2 internal battery if the seatpost isn't an option? On a full-sus mountain bike, or if you run a dropper post? One of the options you have is to install it in the fork steerer.
Installation guide: Di2 Internal seatpost battery
On this page I'll show you how to install your Di2 seatpost battery BT-DN300/BT-DN110 or SM-BTR2 in your bike's seatpost.
Installing the 11-speed handlebar junction and battery in aero extensions
I installed SW-7972 Dura-Ace satellite shifters on my 6870 commuter bike by doing some cutting and soldering, as well as some creative wiring.
Display
Installation Guide: SC-MT800 / SC-M9051 Display
This page describes how to install the Di2 Information Displays SC-MT800 / SC-M9051 and pair them for the first time.
Electric Wire
Building a 12-speed // 11-speed Di2 bike
This page links to the relevant sections on building 11-speed and 12-speed Di2 road and time-trial bikes.
Installation Guide: Wireless Unit / D-fly (EW-WU111)
There are many possibilities for installing the EW-WU111 Di2 D-Fly Wireless Unit. This guide explains how to do that.
Junction
Installation Guide: Bar-end Junction EW-RS910
Route the wires, fit the EW-RS910 junction in your bar end, wrap the bars and connect it, with or without the EW-JC130 Y-splitter. For 11-speed Di2.
Installing the 11-speed handlebar junction and battery in aero extensions
I installed SW-7972 Dura-Ace satellite shifters on my 6870 commuter bike by doing some cutting and soldering, as well as some creative wiring.