component-SC-MT800

The SC-MT800 System Information Display shows you what gear you're in, has a battery level indicator, charging port, synchronized shift mode display and also do

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XT M8050 Dealer Manual

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Information Display User Manual

SC-MT800

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## Current generation battery or mount required
Just like the [SC-M9051](/component/xtr-display-junction-sc-m9051/) display, this SC-MT800 **requires** a modern battery ([BT-DN110](/component/internal-battery-bt-dn110/)) or battery mount ([BM-DN100](/component/external-battery-mount-bm-dn100/)). The display will ***not*** work with the older batteries.

## Synchronized shifting on mountain bikes
If you want to use synchronized shifting on your mountain bike the usual requirements apply - you need either a [BT-DN110 battery](/component/internal-battery-bt-dn110/) or [BM-DN100 battery mount](/component/external-battery-mount-bm-dn100/). 

You will also need a System Information Display. It is not clear why exactly you need one, but I've asked Shimano and they have confirmed that a display *is* required for synchro shift on mountain bikes.

### XTR display vs XT display
In case you are wondering what the difference is between these two displays - there is none. The casing is different, but the functionality is exactly the same.

## Pairing the SC-MT800 - when the 'C' doesn't show
If you've been trying to pair one of these to a mobile phone you may have run into the issue of the 'C' (connection mode) not showing. Some of these units do this, depending on the firmware version. This generally isn't a problem, because they *do* actually go into connection mode. They just don't show it. 

I have written more on this in the [SC-MT800 Installation guide](/sc-mt800-sc-m9051-system-information-display-installation-guide/).

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System Information Display - Junction A

The Shimano [SC-MT800](/component/xt-display-junction-sc-mt800/) and [SC-M9051 System Information Displays](/component/xtr-display-junction-sc-m9051/) not only function as a Junction-A, they also allow for BluetoothLE and ANT+ connectivity. They are compatible with both road and mountain bike systems, but you’ll see these on mountain bikes most of the time.

The only requirement is a [BT-DN110 battery](/component/internal-battery-bt-dn110) or [BM-DN100 external battery mount](/component/external-battery-mount-bm-dn100).

![SC-MT800 / SC-M9051 display](https://assets.bettershifting.com/install_sc_mt800_sc_m9051_c7fd3983aa.png)

## Install clamp to fit your handlebar size
Both of these units can be installed on **31.8mm** and **35mm** diameter handlebars. The clamp they come pre-installed with is the 31.8mm size clamp – this is how you change it. 

![SC-MT800 / SC-M9051 display band](https://assets.bettershifting.com/install_sc_mt800_sc_m9051_display_band_c9ae308bbd.png)

- Using a 2.5mm hex wrench loosen bolt (A) until you can remove the bolt from the display.
- Pull the clamp band away from the display.
- Store the bolt with the clamp band you just removed. The other clamp band has its own bolt.
- Push the new clamp band into place.
- Tighten the bolt (**0.6 N⋅m**, don’t over-tighten it).

## Attach the display to the handlebar
While you could in theory install the display to both sides of the stem, keep in mind that the E-Tube charging port is on the right side.This is why most of them are installed to the right of the stem – you can then easily access the port.

![SC-MT800 / SC-M9051 display attach to bar](https://assets.bettershifting.com/install_sc_mt800_sc_m9051_install_display_bar_c17ab3bb58.png)

- If the clamp bolt is installed, remove it.
- Pull the clamp end apart a bit to open it up and push the clamp and display onto the bar.
- Set the angle of the display and use a **3mm hex wrench** to tighten the bolt (**0.8 N⋅m**).

Play around with the angle of the display a bit – you want to be able to read it while on the bike and also be able to plug in the E-Tube electric wires.

That’s it – the first part of the installation is done. Now let’s update the display’s firmware using the mobile app.

## Update the firmware
Just like with the [EW-WU111 Wireless Unit](http://component/d-fly-inline-wireless-unit-ew-wu111/), these displays have to be updated over BluetoothLE before you can modify or set them up in the Windows application.
(this depends on the firmware version installed, if yours shipped with a newer firmware this step may not be necessary)

Updating the firmware is relatively simple:

- On your phone install the E-Tube Project mobile app.
- Make sure your phone’s Bluetooth is enabled.
- Start the E-Tube Project mobile app.
- Tap the Bluetooth LE connection button in the middle of your phone.
- On the display, press and hold the mode button for 1 to 1.5 seconds. Then release the button.
- You should now see [SC-MT800](/component/xt-display-junction-sc-mt800) or [SC-M9051](/component/xtr-display-junction-sc-m9051) on your phone. Tap that name to connect to the display.

## About that “C”
If you’ve read the Shimano manual for the display you know that it should display a “**C**” when it is in Bluetooth connection mode. However, most units do not display this “**C**” initially – they only do so after the first firmware update.

![SC-MT800 / SC-M9051 display connection mode](https://assets.bettershifting.com/install_sc_mt800_sc_m9051_etube_c_display_feb7de63c9.jpeg)

This can be confusing if you’re waiting for that “**C**” to appear and it never does. Don’t worry, the unit does go into Bluetooth connection mode, it just doesn’t tell you. If you follow the steps above it should connect just fine.

## Shopping links
In case you’re looking to add one of these units to your bike and you want to support the site, consider using the links below. They’ll earn the site a small commission at no cost to you:

- SC-MT800: [eBay](https://www.ebay.com/sch/i.html?_nkw=sc-mt800&mkcid=1&mkrid=711-53200-19255-0&siteid=0&campid=5338714358&customid=installGuide&toolid=10001&mkevt=1) | [Wiggle](http://bit.ly/2Zr896B)
- SC-M9051: [Amazon](https://amzn.to/2C78K4y) | [Ebay](https://www.ebay.com/sch/i.html?_nkw=sc-m9051&mkcid=1&mkrid=711-53200-19255-0&siteid=0&campid=5338714358&customid=installGuide&toolid=10001&mkevt=1)

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This page describes how to install the Di2 Information Displays SC-MT800 / SC-M9051 and pair them for the first time.

System Information Display - Junction A

Current generation battery or mount required

Synchronized shifting on mountain bikes

XTR display vs XT display

Pairing the SC-MT800 - when the 'C' doesn't show

Details & Specifications

Shopping links

More images