Shimano Ultegra Di2 STI ST-6870 2x11-Speed Mechanical Rim Shifter | eBay
E-TUBE | SHIMANO BIKE COMPONENT
User manual Shimano ST-6870 (English - 1 pages)
Ultegra Di2 RD6780. Can anyone confirm the purpose of this spring and tensioner screw? The dealer manual doesn't acknowledge its existence and I've always wondered what the proper adjustment protocol is. :
Shimano Ultegra and Dura-Ace Di2 Electronic Shifting – Everything You Need to Know – Carlton Bale