I'm not trying to be argumentative, but I don't buy any of the skepticism around the BFG KO2.
BFG KO2s are specc'd from the factory on a lot of top-end off-road vehicles here in the U.S. (Bronco, Bronco Raptor, Ford F-150 Raptor, Jeep Rubicon, etc.), and are probably the most popular choice when people "upgrade" tires on their truck or off-road SUV (when looking for a more off-road oriented All-Terrain tire). There are so many of these tires in circulation there are bound to be some complaints. In addition, there are different versions of the tire: it comes in two different rubber compounds - one that lasts longer but is not 3PMSF, and one that is softer but is 3PMSF. The tire also comes in many different load ratings. These variables make comparing the tire complicated, as many people are unaware of the variants, or what variant they actually own. I no longer pay any attention to online reviews of tires from members of the general public. You really need to read reviews of tires from sources that subject the tires to
objective testing. When you look at the specs, you will find that in many cases, the KO2 has a higher speed rating than competitors, a thicker sidewall, deeper tread, and is competitive weight-wise. It is also really quiet for an AT tire. You can use this website to compare specs on most tires:
https://tiresize.com/tires/BFGoodrich/All-Terrain-TA-KO2.htm
My own subjective experience on road: my wife and I have driven multiple sets of BFG KO2s on a Tacoma and 4-Runner. We run E-rated versions with 3PMSF on the Tacoma, and C-rated versions with 3PMSF on the 4-Runner. We have driven on wet, dry, and snowy highways, winding canyons, and around town. These tires are great under all these conditions on-road. I have heard some people comment online that the tires do not perform well on wet roads; that does not match my experience, or my wife's. After reading concerns on this forum about the KO2 on wet roads, we pushed our vehicles in the rain last fall (under safe circumstances), and found no shortage of traction. We do not run the KO2s through the winter, so the snow we drive in with these tires is during the "shoulder season" (end of fall, start of spring). We get very cold temperatures and long snowy winters, and we run Nokian Hakka LT3 tires in the winter.
My own subjective experience off-road: the KO2 performs very well off-road, especially on dirt & gravel roads, on rocky trails, and climbing steep rocks. We have run these tires on multiple desert trips, we drive corrugated dirt roads every day in & out of our property, and we drive steep rocky trails a couple of times per week to access trailheads. The KO2 is not a mud tire, and in deep mud, the treads will pack-out pretty quick, and you will lose traction. The KO2 is also not specifically designed as a sand tire; if I still lived on the coast, and all my off-road driving was on the beach, I would get a different tire.
There are other good All-Terrain (AT) tires in the market. I don't believe that -
when comparing the top AT tires - there is any real difference. The top AT tires will vary in a very small degree, with some being a little better in one category, and a little worse in another - but they are all good. If a person wants to run an AT tire on the Grenadier, there is no reason to avoid the KO2. If one needs a mud tire, that is a different story, and one should buy a mud tire. If one is driving almost exclusively off-road (depending on conditions), it also makes sense to buy a MT tire (they have even thicker sidewalls, and the tread design is biased toward off-road driving). On the other end of the spectrum, if a person is mostly driving on-road, there are better tires than the KO2, and that person should be shopping in a different tire-category. You will get better gas mileage from a more street-biased tire.