If you’re coming, 25s are plenty. (I’m serious). 42-24 is the lowest I’ve used so far and in Sept. 2023 EroicaCa? This is the year I clear all the climbs with that low gear. (Will be 65 y.o. then.)
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I don't do: disks, tubeless, e-shifting, or bead head nymphs. But I do hate all e-bikes.