OEM Wheels

Original Equipment Manufacturer, which is a company that makes parts for the car manufacturer (such as Delco making Chevrolet parts).

When a factory wheel is made, the primary goals the wheel manufacturer has are as follows:

1. durability from road hazards (potholes, etc.).
2. durability from road salts, car wash acids, chemicals, etc.
3. durability in order to minimize warranty claims and/or recalls.
4. ability to properly support the weight of the vehicle and it's passengers + cargo with a huge safety margin.
5. proper fitment to ensure vehicles suspension and brake systems operate as designed and without vibrations.

They go through millions miles of testing as well as millions of dollars in research and development, in order to make sure that the wheel will withstand the rigors of everyday driving and harsh road / weather conditions.