A wheel manufactured by Kelsey-Hayes Company (Kelsey-Hayes) (defendant) came loose from a truck and hit Eric Magnuson (plaintiff), causing him injury. Magnuson brought a manufacturing-defect suit against Kelsey-Hayes on a theory of strict liability. Magnuson’s expert witness testified that the wheel was defective because it was cooled too slowly during manufacturing, resulting in steel that was too thin. The expert testified that if Kelsey-Hayes had properly examined the steel, the defect could have been prevented. The jury found in favor of Magnuson, awarding him $4.75 million. The trial court granted Kelsey-Hayes’s motion for a new trial. Magnuson appealed.