I really like the LiFePO4 chemistry in a commuter board at 12S if extreme range isn’t your need. (Just long range but not extreme range )
They feel hardly any sag at all, they have a super long lifetime, they are very good in very cold weather, and generally more robust than lithium-ion. Just less energy-dense.
12s3p 26650 is a lot. Very bulky. 12s gives roughly 10s equivalent voltage. 14s is worth considering.
I’m running 3 boards with A123. 12s1p china hubs, 12s2p 2x6355, 15s2p hummie hubs. I do get some sag, and wish I did 14s2p on the 6355 build. But it’s okay with 12s.
And +1 to everything b264 said. But I’ll make a distinction between generic lifepo4 and A123.
Your build is an excellent example of where the cell excels. Super high power density, lower energy density so ideal for short commutes.
More benefits:
You’re able to run low capacity with high discharge for airline travel
Higher voltage, lower capacity = faster “km per minute” charging
Super simple battery, no need for 50 cells to make a powerful pack
Choose 15s lithium ion and leave a note that you want lifepo4. I use it for charge only, so 20a would be fine, but I think 20a and 30a have just fishpaper on the bottom, while higher amp ones have fets on the bottom, so get a metal plate with standoffs.
I’ll get you more info if you’re thinking of going this way.