Automobile air conditioner bearing Automotive Generator Bearings belong to the modification type of normal deep groove ball bearing, and own some special design, such as expansion compensation plastic ring, special half snap ring, and high performance grease. The most common types of bearings are wheel bearings. Motorcycle wheels have them, so do skateboards. The bearings help give you a smooth ride. If you want to your car to be smooth to drive, make the wheel bearing particularly one of your priorities. Wheel bearings hold your wheels on and allow them to spin properly.