The most common all-terrain tire size is the 265/70R17. This tire size offers a great balance between on-road comfort and off-road capability, making it one of the most popular choices for SUV and light truck owners who want to take their vehicles out in rough terrain or muddy conditions. The tall sidewalls of this tire offer excellent protection against rocks, potholes, and other road hazards. Additionally, the wide tread pattern ensures maximum traction even in wet or slippery conditions. The spacing between tread blocks also helps improve ride quality while still providing enough grip for moderate off-roading adventures. All in all, when it comes to versatility and reliability on any terrain, the 265/70R17 is an ideal choice that will fit a variety of applications.