So I have a 2001 x5 3.0i. It's a very standard model with the 17 inch rims. I had a 2000 Mercedes ML55 AMG previously. I loved the stance on that car, hated the gas mileage and ride feel.

So my question is, for those that installed bigger rims, did you find the gas mileage drop much. I was thinking of going to a 20 inch wheel oem rims if they fit.

Thoughts?

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