# Ultegra Di2 front derailleur shifting problem **URL:** \ **Category:** Equipment\ **Created:** [July 21, 2024, 1:20pm UTC](https://www.trainerroad.com/forum/t/ultegra-di2-front-derailleur-shifting-problem/94900 "2024-07-21T13:20:55Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![james7604](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/james7604/32/85136_2.png) [@james7604](https://www.trainerroad.com/forum/u/james7604)\ **Post date:** [July 21, 2024, 1:20pm UTC](https://www.trainerroad.com/forum/t/ultegra-di2-front-derailleur-shifting-problem/94900/1 "2024-07-21T13:20:55Z")
I’ve started to see poor shifting with my front derailleur (Ultegra Di2 12-speed R8150) shifting from the small to big ring. Not all the time, but enough to start bugging me. I can generally get it to shift, by dropping a gear at the back and then shifting front derailleur again. Everything had worked fine for a year, and limits should be set up correctly. Problem only started the last month or so. Any ideas on what to look at first? Or should I treat it as if I’m starting setup from scratch? Thanks for any advice. ---
**Author:** ![SkepticalOne](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/skepticalone/32/7721_2.png) [@SkepticalOne](https://www.trainerroad.com/forum/u/SkepticalOne)\ **Post date:** [July 21, 2024, 1:33pm UTC](https://www.trainerroad.com/forum/t/ultegra-di2-front-derailleur-shifting-problem/94900/2 "2024-07-21T13:33:26Z")
Have you replaced chain recently? How many miles on chainrings? ---
**Author:** ![james7604](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/james7604/32/85136_2.png) [@james7604](https://www.trainerroad.com/forum/u/james7604)\ **Post date:** [July 21, 2024, 2:06pm UTC](https://www.trainerroad.com/forum/t/ultegra-di2-front-derailleur-shifting-problem/94900/3 "2024-07-21T14:06:40Z")
About 6000km on the chainrings. Two waxed chains used in rotation since new, so minimal wear. ---
**Author:** ![drh329](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/drh329/32/15137_2.png) [@drh329](https://www.trainerroad.com/forum/u/drh329)\ **Post date:** [July 21, 2024, 2:22pm UTC](https://www.trainerroad.com/forum/t/ultegra-di2-front-derailleur-shifting-problem/94900/5 "2024-07-21T14:22:59Z")
My ultegra DI2 does the same thing with a freshly waxed chain, after a couple miles it works flawlessly. ---
**Author:** ![james7604](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/james7604/32/85136_2.png) [@james7604](https://www.trainerroad.com/forum/u/james7604)\ **Post date:** [July 21, 2024, 3:50pm UTC](https://www.trainerroad.com/forum/t/ultegra-di2-front-derailleur-shifting-problem/94900/6 "2024-07-21T15:50:08Z")
It happens with chains that are “bedded in” so I suspect it’s not that, but I’ll keep an eye on it. ---
**Author:** ![jazir1979](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/jazir1979/32/13033_2.png) [@jazir1979](https://www.trainerroad.com/forum/u/jazir1979)\ **Post date:** [July 21, 2024, 10:24pm UTC](https://www.trainerroad.com/forum/t/ultegra-di2-front-derailleur-shifting-problem/94900/7 "2024-07-21T22:24:39Z")
Have you had the cranks out at all? I’m on the 11sp 8050 so went into the shop for the recall inspection. The shop somehow managed to not get the crank all the way back in when replacing, and it mostly felt fine, but the small alignment difference caused issues until I realised what had happened. ---
**Author:** ![Chiara\_Morelli](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/chiara_morelli/32/139576_2.png) [@Chiara\_Morelli](https://www.trainerroad.com/forum/u/Chiara_Morelli)\ **Post date:** [July 25, 2024, 9:35am UTC](https://www.trainerroad.com/forum/t/ultegra-di2-front-derailleur-shifting-problem/94900/9 "2024-07-25T09:35:34Z")
Hello! I am having exactly the same problem on a Shimano Ultra R8150. Right after turning on the shifting system pushing the bottom of the rear derellieur once, the shifting of the front derelliueur works just fine (I can shift up and down multiple times without problems). However, in the middle of a ride, it can happen that I can not shift anymore from the small to the big chainring (from big to small always works well). I usually get it to work after many times. I did a firmware update of front and rear derailleur but it did not solve the problem. I use waxed chains and change then every 300km, the problem does not seem related to them. Do you think it may be a misalignment of the skid plate? Anyone who solved the problem? ---
**Author:** ![Chawski](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/chawski/32/12890_2.png) [@Chawski](https://www.trainerroad.com/forum/u/Chawski)\ **Post date:** [July 28, 2024, 9:50pm UTC](https://www.trainerroad.com/forum/t/ultegra-di2-front-derailleur-shifting-problem/94900/10 "2024-07-28T21:50:20Z")
any chance the cage got dinged and its bent a hair? Ive had that happen and your symptoms sound identical. If not, id just start fresh. move the adjuster to 0 and follow the startup guide from the app. If that doesnt work, its time for a trip to the shop ---
**Author:** ![james7604](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/james7604/32/85136_2.png) [@james7604](https://www.trainerroad.com/forum/u/james7604)\ **Post date:** [August 10, 2024, 1:24pm UTC](https://www.trainerroad.com/forum/t/ultegra-di2-front-derailleur-shifting-problem/94900/11 "2024-08-10T13:24:41Z")
Finally got the chance to take a look yesterday, took the derailleur off and started setup from scratch again. Shifting fine in the stand, but still intermittent issues during this mornings ride. Will probably live with it until it bugs me enough to take to the bike shop. ---
**Author:** ![fasterthanever](https://avatars.discourse-cdn.com/v4/letter/f/4bbf92/32.png) [@fasterthanever](https://www.trainerroad.com/forum/u/fasterthanever)\ **Post date:** [August 10, 2024, 6:01pm UTC](https://www.trainerroad.com/forum/t/ultegra-di2-front-derailleur-shifting-problem/94900/12 "2024-08-10T18:01:00Z")
This might be worth looking at: [![](https://global.discourse-cdn.com/trainerroad/original/3X/a/4/a4ba720ae0f32df502e2b442fce3e35be5fce518.jpeg "Front derailleur isn't working, noisy motor, broken arm...") ](https://www.youtube.com/watch?v=uKhj-irSOGE) ---
**Author:** ![Punter69](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/punter69/32/157921_2.png) [@Punter69](https://www.trainerroad.com/forum/u/Punter69)\ **Post date:** [February 25, 2025, 3:03am UTC](https://www.trainerroad.com/forum/t/ultegra-di2-front-derailleur-shifting-problem/94900/13 "2025-02-25T03:03:29Z")
Hi - did you solve this? I have Ultegra 12sp. 3500km old and exactly the same issue. The shifting ramps on the big ring look like theyre worn. Ive borrowed a lightly used second chainring from the mechanics bikes and its much better. 3500km ol and chain ring worn out seems unacceptable