Mike Nelsonwrote a review of WTB Trail Boss TCS Light FR Tire - 29 on August 7, 2015
Familiarity: I've put it through the wringer
A lot of my best miles in the last decade have been on WTB tires. Classic small treads like the Weirwolf, Nanoraptor, and Wolverine always treated me well on my old 26-inch bikes. Tire disigns have changed as manufacturers have realized that well placed blocks are as good or better than complicated tread shapes. I picked up a set of WTB Trail Boss tires for my Niner RIP 9 RDO, opting for a 2.4 for the front, and a 2.2 on the back. The tires looked good out of the package, and seated tubelessly to my Reynolds wheels with just a floor pump.
On the trail, the tires rolled well and gripped in most situations. Unfortunately there is one recurring problem. When the trail is very dry and loose, the front tire has a tendency to break loose unpredictably, especially when cornering. Since this is a frequent condition in Northern Utah where I ride, I lost some elbow and knee skin to this tendency. I kept the 2.2 Trail Boss in the rear, but swapped out the front for a 2.3 WTB Vigilante.
I'd recommend the Trail Boss as a faster-rolling front and rear tire on trails that are a little more loamy well-consolidated, or as a rear tire for the loose dry and dusty stuff that covers a lot of the drought-stricken west.