The advanced design & engineering of the Ameri-G4S puts you in the drivers seat. Why? The Ameri-G4S was designed using Generals latest Finite Element Analysis. This technology uses computer modeling to predict road conditions & vehicle dynamics to build a top performing, long lasting tire. Put simply, the Ameri-G4S can help you take the guesswork out of driving in unpredictable weather. And it comes with a 80,000 mile tread wearout warranty.