# Di2 Compatibility

**URL:** <https://www.trainerroad.com/forum/t/di2-compatibility/28247>\
**Category:** Equipment\
**Created:** [January 20, 2020, 11:46am UTC](https://www.trainerroad.com/forum/t/di2-compatibility/28247 "2020-01-20T11:46:59Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Tom\_Jordan](https://avatars.discourse-cdn.com/v4/letter/t/a3d4f5/32.png) [@Tom\_Jordan](https://www.trainerroad.com/forum/u/Tom_Jordan)\
**Post date:** [January 20, 2020, 11:46am UTC](https://www.trainerroad.com/forum/t/di2-compatibility/28247/1 "2020-01-20T11:46:59Z")

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Hello! need advise on Di2,

shifter ultegra 6870  
Front Derailleur 7970 ext battery  
Rare Derailleur 6770 ext battery

Would these combinations are compatible to each other?

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**Author:** ![Smurf](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/smurf/32/16911_2.png) [@Smurf](https://www.trainerroad.com/forum/u/Smurf)\
**Post date:** [January 20, 2020, 2:38pm UTC](https://www.trainerroad.com/forum/t/di2-compatibility/28247/2 "2020-01-20T14:38:15Z")

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Welcome to the Forum

It looks like your shifters and rear derailleur will work but not the front

> **[E-TUBE PROJECT-EU](https://bike.shimano.com/en-EU/e-tube/project.html)**
>
> Using the Shimano genuine app E-TUBE PROJECT allows you to customize your bicycle or update the firmware.

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<div class="post-metadata">

**Author:** ![Tom\_Jordan](https://avatars.discourse-cdn.com/v4/letter/t/a3d4f5/32.png) [@Tom\_Jordan](https://www.trainerroad.com/forum/u/Tom_Jordan)\
**Post date:** [January 20, 2020, 7:10pm UTC](https://www.trainerroad.com/forum/t/di2-compatibility/28247/3 "2020-01-20T19:10:34Z")

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That is just what I thought… thank you so much, 7970 really causes pain in the ass.

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**Author:** ![bluescatjm](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/bluescatjm/32/12895_2.png) [@bluescatjm](https://www.trainerroad.com/forum/u/bluescatjm)\
**Post date:** [January 21, 2020, 10:18pm UTC](https://www.trainerroad.com/forum/t/di2-compatibility/28247/4 "2020-01-21T22:18:11Z")

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As I understand it you cannot mix 10 speed and 11 speed di2, though I’ve had good luck mixing different generations of dura ace and ultegra, 11 speed di2.