• Roughly about 4:

    The Sram charger is probably bulkier than it needs to be, but if you carry 1 spare battery (which is sensible anyway on long trips) you could charge it on the go. Also depending on use, FD battery is likely to last longer, and you can swap it to the rear with the front staying on on of the rings in a 1x arrangement if you run out of battery.

  • I mean I'd never contemplate SRAM for ultras but how big is the SRAM charger in that setup?

    Why run a 1x w/ FD, just carry the spare battery, no?

    EDIT: Oh, you mean you would have the use of just 1 front ring while it charged. I get you.

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