Profile: Linqing Prime Seiko Parts (bearing) Co., Ltd. is a bearing supplier that provides a full range of ball and roller bearing products. Wheel bearing are one of the most crucial components of a car's suspension. They are usually located in the hub (the part that the brakes and wheels are attached to) or even the brake drum or rotor itself. Wheel bearings allow the wheel to rotate freely as the car travels down the road. Most cars have an inner and an outer bearing on each wheel.