I’ll be travelling somewhere in-between light and ultra light. i.e Base pack weight less than 6kg + food.
Rackless setup.
Rollup out front, rear saddle bag and full size frame bag.
Cant see it being flexy. I’ll be around 75kg when I hit the road.
Similar to my bikepack set-up. 4.5kg is about as low as I can go if sleeping out. By the time you add food, water and those extras that creep in, 7-8kg, maybe 10kg at times. ime that’s enough to start noticing a less stiff frame flexing, but that’s for off-road use (I’m same weight as you). A friend is riding across Asia at the moment with that kind of set-up on a Surly Ogre, he’s quite happy with it all.
Interested in the dinglespeed idea for this.. where are you riding, on or off-road? I’ve tried a few bikepacking rides SS and it’s ok, I like the idea of simpler drivetrains but would prefer a few gears. Not tried the dinglespeed idea yet.