And For touring always bring a couple extra tires , 650b may only be in French bike shops ..

when you need a replacement after a casing blowout. rare to nil anywhere else.

of course owning a 'touring bike' and actually going long distances on one is 2 separate things..


Rohloff, trekking Bars, dynohub, with or without disc brakes.. are all good ..

Cane creek 'thudbuster' seat posts also good

Go IGH? Have them discuss chain tensioners schemes .. sliding dropouts ,
Rohloff supplies engineering drawings for frame builders to use.
My Koga WTR has used some that resemble those... 100% reliable (so far)

Paragon machines ones that some builders like.

and using Tandem Eccentric BB's are both solutions, that work.
R&E , Thorn Raven, and Tout Terrain, examples of working productions.