It’s a di2 port.

OK, thanks. just seems like an odd place under the top tube when the cables enter on the down tube.

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Swimming Workout of the Day:

Favourite Swim Sets:

2020 National Masters Champion - M50-54 - 50m Butterfly

Looks a strange place for Di2 to enter.

In t'old days I think they used to have a hole thereabouts for a wired SRM cable. But you said TCR Disc so I know it isn't very old. Maybe they kept it there just in case.

Yep di2. Agree it is an odd placement.


https://www.bicycling.com/...sc-race-bike-review/

Let me know if ya need help routing, I have one of the park tools guide wire sets.

Oh, I’m not getting one, just doing my periodic scan of “maybe I’ll get a new bike” but in the end I’ll stick with my old Serotta steel and my USPS oclv

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Swimming Workout of the Day:

Favourite Swim Sets:

2020 National Masters Champion - M50-54 - 50m Butterfly