what is your comparison point? what tyre did you have?
have ran gp4000II in 25 and 28s in the past, and have been running 32mm gravelking before this at around 55/60 psi - not tubeless.
Think the tubeless part is really the difference - I wasn't brave enough to go low pressure before as i'm pretty heavy and was scared of pinch flats.
@gillies started
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what is your comparison point? what tyre did you have?