Hi John.
I'm PM-ing you since you are very experienced with 36-inchers.
I upgraded from a 36'' standard qu-ax, with a smooth tyre. (It's got no knobs, but 3 or 4 vertical lines)
I upgraded to a KH36 with the nightrider tyre.
Every post I find says the nightrider is a fantastic tyre.
I don't use my KH36 for offroad though - I've built a handle which won't work nice for offroad.
I plan to do the Cape Argus 108km next year, which I think is the biggest cycling race in the world.
Should I swap tyres and put the smoothy on my KH36?
when riding with the nightrider, the knobs make a sound on the road, which I think is slowing me down.