Recent 25++ Bmw X5 Tires. Browse the full selection of tire sizes tpms (tire pressure monitoring system) is an electronic system that monitors tire air pressure. I walk you through the process and how i got a great deal on a very nice set of tires! The tire size for your bmw x5 depends upon the year of manufacturer. Recommended tire pressure for bmw x5 tires to improve fuel efficiency, extend tire life and drive safely.