Run-flat tire
Can support restricted continued driving after certain pressure-loss events.
On wheels approved for the tire and vehicle combination.
Reinforced construction supports the tire under specified emergency conditions; speed and distance limits come from its guidance.
A shoe with reinforced sides that can carry limited load when deflated.
A pressure warning still needs action; run-flat construction does not prevent punctures or all damage.
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.
Not every BMW uses run-flat tires, and a tire’s sidewall marking identifies its construction.
BMW models using the specified wheel and tire combination; approved sizes vary by vehicle.