Why doesn’t BMW come with spare tires?

No spare tire needed: bmw designs many models without a spare tire to reduce weight, increase cargo space, and improve fuel efficiency. Run-flat tires make this possible by allowing you to continue driving after a flat. Most bmws, including the 3 series, 5 series, x3, x5, and x7, no longer include a spare tire from the factory. This leaves drivers at risk during unexpected flat tire situations.