Surly Dingle

here's a practical set up, surly travelers check (bike couplings so can be put in a suitcase) with dingle so you can set the preferred gearing at the destination

I'm guessing he doesn't change it multiple times a day. more like, "wow, this part of Thailand is hilly, I'll select the lower ratio for the few days I'm here"

https://surlybikes.com/blog/dont_carry_cash_carry_travelers_check