These tires came as original equipment on my new mountain bike. I found them to be excellent in the hard pack, dry conditions of southern Oklahoma and northern Texas. However, if you ride in anything soft they won't grip well. And forget about muddy or wet conditions off-road. They perform very well on wet pavement (best I've ever ridden on).
I ended up taking them off of my new bike and putting them on my old Gary Fisher which I ride primarily on-road. I take my old bike off-road occasionally with these tires (the bike has no suspension front or rear) and they work well for this bike.
I've had these tires for about 1 12 years and they are badly dry rotted.
I ride in the Desert Southwest and I like the traction the small block provides without compromising my speed out on the trails. This is my first set of tubeless tires and Ive already made up the cost wich otherwise I woul have made repairing four punctures!
This is the best back tire for either hardtail or full suspension bike. Works best in dry or rocky conditions (Western). Not the best for mud though, does not shed well. Fast rolling, lite, good traction, breaks traction very predictably. Don't put on the front, as it will tend to wash out. Pick a bigger knobbie tire for that purpose.
Quick and responsive. Fast rolling tires. Great for slick rock and hard pack. Not good at all for mud or often you have to go through water and there's technical riding immediately after the water.
Hit some pretty unforgiving trails in Shenzhen China. The small Block Eight just couldn't navigate the slighlty wet, unsettled rock ground. At one point flying around a small traverse I almost slid straight off a 10 meter drop...luckily the tired grabbed at the last second (so far that i thank the tire, however, i believe with a larger knobbed, tackier material i would have never been in that compromising situation. I will definitely not hit these trails without swapping out my K1047 for improved traction and bite.
I'm by no means an expert so I'm sure a major part of my issues is user skill!