Me and Ms. Sierra live up in the mountains. As you approach our home you have to navigate two, rather steep asphalted sections of road. Each section is approximately 600' in length. It's not an issue when it's dry but when it's wet we sometimes have a tough time going up these two sections (spinning wheels). Neither of our trucks have four-wheel drive and replacing either of them is not financially feasible for us at this time. The Frontier still has the factory tires on it and they are getting close to replacement. The Sierra had tires replaced three years ago before this became a problem for us. My question: What kind of tire/tread, if any, would help navigate these two sections best, IE. All terrain, off road etc... Or are we just stuck fighting this issue and moving forward? Appreciate the help.