Designed so the center hole of the wheel fits perfectly over the hub's center lip, ensuring the wheel is perfectly centered. These often use hub rings if the wheel diameter is larger than the hub.

An electronic sensor that tracks wheel speed for the car's computer.

A specific type of rear hub that allows a cyclist to coast (freewheel) without the pedals turning. 3. Key Components Hub Flange The flat, plate-like part where the wheel and rotor sit. Wheel Bearings Precision-made balls or rollers that facilitate rotation. Lug Studs

Install the new hub and torque all bolts (hub, axle nut, and lugs) to the manufacturer’s specific foot-pound (ft-lbs) ratings.

Physical looseness when the wheel is rocked by hand while the vehicle is lifted. Replacement Basics: Remove the wheel, brake caliper, and rotor. Unbolt the hub assembly from the steering knuckle.

The wheel is centered by the position of the lug nuts/studs rather than the hub itself.

Modern hubs often include ABS (Anti-lock Braking System) sensors that monitor wheel speed for traction control. 2. Types of Hubs

A growling, humming, or chirping sound that changes with vehicle speed. Vibration: Shaking in the steering wheel or floorboards.