Troubleshooting Shimano Di2 With Nightmare Internal Routing | Inside TPC | TPC

Complicated Shimano Di2 wiring + internally wired TT cockpit = nightmare? Not if our master mechanic Carl is doing all the work for you. This 2022 Trek Speed Concept SLR 7 came in with a 12-speed Ultegra Di2 rear derailleur that wouldn’t shift. Troubleshooting and routing Di2 wiring on a triathlon bike can be a pain, but Carl wasn’t afraid to dive into the Di2 nest to find the problem.
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0:00 Initial inspection
1:18 More electronics, more problems, am I right?
2:20 Di2 Diagnosis from Dr. Carl
3:23 Is internal routing good or pure evil?
4:39 Check out this rat’s nest
6:37 Hide your frustration with compliments
7:37 “Routing tri bikes fun,” said no one ever
8:52 Beep, boop. System rebooting
9:32 Routing 2: Electric Boogaloo
10:48 Checking Carl’s work

[@davefeldman3740]

I have worked on several dozen tri bikes with mechanical shifting and these bikes are the perfect place for electronic systems! Even the best of them have so many bad corners and so much cable drag; the only ones where mechanical shifting works well are the entry level bikes with no internal cables. When di2 first came out, I thought two things--they belong on tt bikes and folding bikes. Works great on my Bike Friday!

[@daniels.2720]

What I learned today: Carl @ TPC probably deserves double the pay

[@Pienimusta]

Would go insane trying to troubleshoot that at home.

[@enigma1000]

I’m now wishing I hadn’t bought Di2 for my new bike and I haven’t even ridden it yet…..