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I'm sticking with discs, Di2, dyno hubs and tubes.
If I was racing Indipac though I'd probably just take my S-Works. You won't need brakes for about 4000 of the 5000k and with the reduced gear changing compared to TCR, cables are one less thing to drain batteries. Less likely to get overuse injuries in hands with cable stuff too so I'd go for my lighter bike and older Dura Ace config.
hippy-
Yes, that would make sense.
I've gone back to tubes for IndyPac as I'm using my best wheels. They're a bit old now so I don't mind if they take a bit of wear. Now I've discovered 9/10 sp wheels take 11 sp MTB cassettes they have a second career ahead of them!
The Di2 is worthwhile for the multiple shift positions; wouldn't be such a big deal purely for smoother shifting.
frank9755
There's risk in riding without carrying a little power station on the bike. And it creates some stress when you are down to your last couple of duracells, or when you need a hotel to recharge.
But I like my setup and think it works well. I basically have two systems, AAs and power banks. Everything can run off either. I mainly use the power banks first with the AAs as back up.
I always use rechargeables for anything up to and including PBP so only used disposables on TCR and now IPRW. Probably uses more resources to manufacture the dyno that I don't have than the AAs I get through. I've only ever stopped to recharge while sleeping in the hotel. Costs me a minute to plug them all in and unplug.
Can see the advantages of fit and forget dynamo but I expect most people don't realise how well you can manage without one.
Shall I talk about my rim brakes next?