235/60/18 in either brand would transform your X5 into the ultimate winter driving machine.

__________________
2008 X5 4.8i Space Gray/Tobacco, Premium, Sport (includes AD), Active Steering, HUD, Tech, Comfort, Cold, Climate Package, 3rd Row, Prem Audio, running boards, OEM hitch
2005 X5 4.8is Imola Red, Nav, Nappa, Comfort seats, OEM hitch
2004 X5 4.4i Sport (sold)
2004 X3 3.0i 6MT (sold)
2002 M5 (sold)