The SA2100 is Otani's All Terrain tire built for rugged terrain. All-Terrain Standard “As an all-terrain tire, drivers will experience stiff treads wrapped around a stiff and durable carcass. The sidewalls of this tire are reinforced in order to block rocks or other debris from cutting or chipping away at the tire. Deeper grooves between tread blocks further increase grip on off-road conditions. However, these treads are staggered and constructed in such a way that they do not create excessive vibration while rolling on flat surfaces, such as roads. This allows the tire to drive on roads without wearing out or agitating the driver.”