The Goodyear Wingfoot tires used on the 1969 Apollo 11 lunar rover were engineered so that if one tire completely deflated, the rover could theoretically continue operating on the remaining three wheels, yet this redundancy was never tested on Earth because NASA feared that publicly demonstrating a flat tire scenario would undermine confidence in the mission—meaning the tire’s most critical design feature remained completely unvalidated until the actual lunar surface proved its worth.
Car Fact #81 — September 5, 2026
