This post has made me think.
I run 2.35″ Single Ply High Roller on my XC/Trail bike. Excellent, but they are bit heavy and draggy. But if i put anything lighter on I just get flats, even with 40psi.
I mostly ride DH so tend to hit things pretty hard. Most of the other DHers i know run big heavy tyres on their XC bikes.
When i was more of an XC whippet i used to run some Hutchinson Pythons, in the dry and they were unbelivably fast. But when i tried these last year they just flatted as i bang into things.
So i would think that the suggestions of thinner tyres is all good and well, but not if you hit things hard they flat all the time.
Don’t anybody say just ride smoother, that no fun!
So the best solution, with less compromise (other than money!) is a lighter wheelset?