28 which turn into a sharp 30 when on my tubeless DT Swiss. Not going back to less than 28 ever…
I chop and change between 28 and 30c on my 24mm int rims, the measure out to 30&32mm.
Get a bit more comfort from the 30s and don’t appear any slower even though they don’t feel as sharp as the 28s
I’ve got GP5000 S TR in a 32 and I’ve got them on a x-wide carbon gravel wheelset, when I don’t have the pathfinders on them for races. I’m running tubeless and generally have the pressure between 40 and 50 and they are super comfortable and seem to have great rolling resistance. I hate to keep saying this but I’ve never had a flat with tubeless, and I’ve had good luck with mounting with just a regular floor pump.