Gave them 4 stars just because they're a very niche tire, not something I'd roll all the time. That said, they've been my go-to gravel tire all winter. Plenty of traction on snowy, muddy, looser conditions. My experience with WTB tires in general has been great. Maybe a little difficult to set up, but once on the rim I really liked them (I've run Horizon in the past and currently keep a set of Byway's mounted during summer). The Sendero isn't something I'd run all the time, like I said above, but when traction is the goal, this one provides plenty. Considering their intended use, I wouldn't grade them down for rolling resistance as they are most likely to be plowing through snow or mud or other terrain that provides far more resistance than the tire/tread. If that's a concern for you, I'd probably look at something more like the Raddler/Riddler.
Are you looking for Jeep tires for your gravel bike? These are them.
Are you single-track-on-your-gravel-bike-curious? They do that.
Do you like to taunt roadies with that "rahr, rahr, rahr" sound as you creep up on them? These are for that too.
They are my goto all road tire for daily ramblings. I don't ride a mountain bike, I just pretend my carbon fork is invincible...
Now, the things they are not the best at:
* Fast cornering through sketchy, soupy gravel
* Mud - like most gravel tires, they don't shed mud very well
Run these tubeless (only way to go) on Easton EA70 650b wheelset. These tires are great for multi-surfaces with my gravel bike, road, gravel, single track (as long as not extremely muddy). They roll well, clear well and provide excellent traction. Being tubeless I get a comfortable ride, I'm about 80kg and run the front at 38psi and the rear at 42psi - nice cushy ride.
Highly recommend these tires, not only do they handle well, I love the gumwall look!
I bought a couple 36c Exposures to replace a set of Maxis velocity AR tires that developed lumps under the tread after 1000 miles. These tires are great. They roll easy and smooth and have not had any flats in 700 miles. I'm running them tubeless with Orange Seal Endurance sealant. I weigh 170 pounds and run them at 35 psi on the front and 50 psi on the rear and the ride is very forgiving on on rough asphalt roads. They are hard to install on giant CXR1 wheels but I succeeded using soapy water and tire levers.