Hello and thanks for checking out this Shimano EW-7975 A2 BT1 internal wiring harness for your first generation Shimano Dura-Ace Di2 7970 time trial or triathlon bike! I discovered a batch of these in the back stock of a high-end bicycle manufacturer. Each will come to you in the true "NOS" new-in-box condition seen in the included photographs.
Use this wiring harness to maintain the electronic Di2 shifting system on your *FIRST GENERATION* Shimano Dura-Ace ST-7970 equipped bike. No longer available from Shimano and completely essential for proper communication between your shift levers, battery, and derailleurs. Short mount battery holder included. This *internal* kit includes heat shrink tubes to install the system to Shimano spec.
Battery not included!
Please see the included pics of a representation of the actual kit you will receive.
Original MSRP of $330...pick one up here for less!
Contact me with questions, I will do my best to answer them. Review my feedback and buy with confidence. Thanks again.