Wheels & tires
Wheel bolt
Clamps the wheel to the hub.
Through the wheel centre into the hub; BMW uses bolts rather than studs on most models.
Correct tightening torque stretches each bolt slightly so friction between wheel and hub carries the load.
A bolt that holds the wheel on.
Vibration or a loose feeling after a wheel change needs immediate checking with a torque wrench.
Inspect tread, age, pressure and damage rather than using appearance alone. Wheels and bearings are assessed for condition.
Inflation correction is small work; tire sets, forged wheels and damaged hubs can be much larger expenses.
Many BMWs fit one locking bolt per wheel; the adapter key should stay in the car.
BMW models using the specified wheel and tire combination; approved sizes vary by vehicle.
Same system