Breaks Observed in Rover Wheel Treads
Breaking after a mere 10 miles, to me sounded really awful, but apparently they planned on this. The construction must have been to save on weight, making the wheels no more reliable than the exact distance they wanted to travel: "...milled out of solid aluminum. The wheels contact ground with a skin that's about half as thick as a U.S. dime, except at thicker treads."