I've ridden my tires lower than even the 100 I had them at today and I don't like the squishy feeling. And I've always had a lot more flats when less inflated. I've mentioned in some other threads that I'm looking to try a 28, but I don't think it'll fit in the rear, and a GP4000 25 rubbed too. Everyone is saying that the GP5000 runs true to size and are narrower. Maybe a larger tire won't feel as squishy at lower pressure? I could put the 28 in the front but with the Shockstop I feel like I'm covered there.