Wheels & tires

Wheel bearing

Lets the wheel rotate smoothly while supporting vehicle loads.

Where it sits

Inside the hub or wheel carrier.

How it works

Rolling elements carry radial and axial loads through protected bearing races.

Think of it as

A low-friction support around the wheel’s rotating center.

Symptoms when it fails

A speed-related hum or play can involve bearings, tires or another rotating component.

Lifespan

Inspect tread, age, pressure and damage rather than using appearance alone. Wheels and bearings are assessed for condition.

Repair cost

Inflation correction is small work; tire sets, forged wheels and damaged hubs can be much larger expenses.

The BMW angle

BMW bearing assemblies can include a magnetic encoder used by wheel-speed sensing.

Used in

BMW models using the specified wheel and tire combination; approved sizes vary by vehicle.

Sources
Same system

Wheels & tires