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I have explored these bikes already, my main problem is either availability or costs - Pipedream finally has revised the geo and has proper 70 mm BB drop, but just the frameset would be 66% price of used Trek 920 that I could buy (let alone if customs add some toll for shipping to Poland). Adding any decent wheels and hydro drivetrain would make it cost even more. I have been attracted by Sutra for a long long time, but basically since 2020 the only ones I have seen available in Poland or second-hand in my size were the basic SE alloy ones.
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Unrelated to your discussion but spotted you were Polish or in Poland and noted these guys on my twitter feed the other day: https://bikepacking.com/news/2022-rondo-ruut-x/
Have a look at Riverside Touring 920, Sour Purple Haze, Kona Sutra, plus others like the Pipedream ALICE that are available as a frameset. Handy list here - https://bikepacking.com/index/drop-bar-mountain-bikes-29er/
If you only need 27.5×2 there's loads of options these days