Good Year have a massive R&D facility as they are pretty well the most technologically advanced tyre on the market. They got all their help from clients such as the US military, just as Banks Diesel did, and Good Year have state of the art design software as well. Some people will whinge about a tyre not lasting 120,000klms, but with the likes of satisfying all the criteria, longevity sometimes is a sacrifice for grip and performance especially in wet conditions. I have had a few sets of Wrangler DuraTrac and hands down are awesome. Mate had the Silent Armour AT and he loved them more than the Falken Wildpeaks and the set of Geolandars he had. For the price at the present (3 for 4), you cannot go wrong as far as a quality product. My next set will be Wrangler again. No matter what tyre you buy, make sure they are LT (Light Truck) rated. Most Good Year tyres in Australia are, but in the US they sell "P" (Passenger) rated which are less rugged in design, more likely to puncture if in that terrain/circumstances.