Quote:
Originally Posted by gee-m-w
I think people want to know the offsets. We see it's a 19" x 9" in the front and 19" x 10" in the rear.
275/40 18" is a much taller tire than BMW has used on previous cars like the E90. This is 26.7" in the rear, compared to 25.0" for E90 sizes. 255/40 18" for the fronts is a 26.0" tire.
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The E9X M3s with 18s came with 245/40 and 265/40 tires.
Going to 255/40 and 275/40 on 18s only increases the diameter by about 8mm (0.31"). The 19s would increase by about 7mm (0.28"). Not sure where you are getting the extra 1.7" from
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