TJ- you're right, but problem is the longer events – esp the Kielder – have pretty much all conditions. The 10UTB for example had fire roads, tarmac, dry rocks, bogs, and dirt singletrack all in a 10-ish mile lap! And then add in weather variability over the course of a long race…
So I guess I'm looking for a reasonably all-round, lightweight, low-rolling-resistance, reasonably grippy tire. I've kind of narrowed my thoughts down to:
1) Nobby Nic front, Racing Ralph rear
2) Conti Speed Kings front & rear
Open to other thoughts. Have heard good things about some of the Hutchison tires, but I don't believe they are meant to work very well with Stans NoTubes.