Today, sealed wheel bearings and bearing-hub assemblies account for the majority of wheel bearings on vehicles today.
The most common type used today is the Generation 3 bearing. This is a compact bearing unit with two flanges: One is the wheel hub, and one is a mounting flange to bolt it to the steering knuckle. These also can come with or without ABS-sensor rings, and, in many cases, the wheel-speed sensor is built into the bearing assembly.
When it comes recommending replacement bearings or hub assemblies, encourage your DIFM customers to use a premium product. They typically use higher-quality materials and heat-treating processes that make for harder surfaces, which are better-suited to resist impact damage.