A brief look at BFG's website reveals that all-terrain KO's are not listed. I would assume that they developed the KO2's to replace them. That's a normal part of life. Manufacturers attempt to improve their products and phase out the old ones. Sometimes we agree with the new being better and sometimes we don't.
Not sure what bad reviews you have read. But, when considering consumer reviews, especially voluntary on-line reviews, I keep the following principles in mind.
1. What is the reviewer comparing this product to? Did they use it properly? Is he/she expecting an all-terrain tire to be equally suited to mud as compared to a mud terrain tire? maybe expecting a mud tire to deliver 80,000 miles of use? Sometimes the reviewer is expecting something unreasonable and that doesn't come out in the way they worded the review.
2. In general, people don't take the time to write a review or send feedback unless their experience is really negative. ie; they're really PO'd about it. This does 2 things.
- In anger or frustration, they may exaggerate their claims to try and make sure everyone else feels the same way.
- Also, this means the "data" is biased because even though there may be a higher number of satisfied people, a far fewer number of them took the time to write a review.
I bought a used set of BFG all-terrains for my truck. That decision was made partially due to finances. I got a set of 35's that are a couple years old, but only have about a hundred miles on them, for $600. I'm happy with that. I did read some reviews leading me to believe that as "all-terrains" they may not be extremely well suited to any one particular type of terrain. I can accept that. I plan on doing mostly trail riding, with some driving around the farm and occasionally going to Lowe's or Advance Auto or even commuting to work. So I will hit everything from interstate pavement to gravel, rocks, grass and mud.
But I can't keep 2 or 3 sets of wheels and tires handy all the time. Maybe for my next set, I'll have the money to get brand new Mud terrains, which I used to run on my F150 and enjoyed very much.