[quote=Boston X5 4.4]Wouldn't expect any tramlining for 18's - yes for 20's +.

I agree - but I think it has to do more with the width of the tires.

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2008 BMW X5 4.8i (E70)
Alpine White, Burl Walnut, Nevada Black, Sport Package, Cold Weather Package,
Premium Package, Technology Package,
Rear Climate Package, iPod adapter