Yeah, I've heard that the K70s don't last that long. My front Speed Master was pretty worn after 7500 miles. The rear Safety Mileage was still in pretty good shape, probably could have gone another 3-4000 miles. I wanted to go with some tires that had more traction on loose surfaces and had a more rounded profile in the rear. Also, I wanted tires that had the old school look to match the my G5.