save your time, the 20s have been OOS for several months everywhere I could look. I wanted all seasons and the best option was Toyo Proxes . they have been fine so far.

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2008 X5 Black
Active vent. seat Package, Cold Weather Package
Premium Package, Premium Sound Package
Rear Climate Package, Sport Package w/ 20" wheels
Technology Package, Active Steering
Comfort Access system, Running boards
Comfort seats w/lumbar support, Heated front seats
Heated rear seats, Dark Bamboo wood trim
3rd row seat, Park Distance Control, Navigation system, Head-up Display, BMW Assist, HD radio, Satellite radio, Rear seat entertainment, iPod and USB adapter