I put Michelin Latituds on my X and don't get much noise from them. I do however got alot of windnoise which I dont really know how to fix. I dont want to spend a ton of money replacing every seal on the X. Congrats on your purchase and good luck.

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2005 X5 4.8is
2002 E39 M5- sold
1995 E36 M3- sold