OEM (Original Equipment Manufacturer) tire sizes are the specific tire dimensions recommended by the vehicle manufacturer. These sizes have been extensively tested and designed to provide optimal performance, safety, and fuel efficiency for your vehicle. Aftermarket tire sizes are alternative dimensions that may offer improved handling, personalized appearance, or cater to specific driving conditions, such as off-roading or high-performance racing. However, upgrading to aftermarket tire sizes can also present potential drawbacks, including compatibility issues and warranty concerns.2