Nokian NBX kevlar bead.
Unless are sub 100 lbs and stay away from all rocks, avoid this tire.
I tried a huge range of pressures, still, pinch flats, pokey hole flats, you name it. Not one thorn,
just pressure impacts. No slow leaks, all instant blowouts. I bought a dozen tubes, thinking that
I'd set for a while. This thing ate up half of them in a month. I never get flats! Well can't say
that anymore can I.
Oh yeah, I ran it tubless with stan;s for a bit too, blew bead off the rim at 35 PSI.
P.S.For Sale: one slightly used NBX for sale, plenty of tread left :-)
-Bruce