I own a MY18 X30i (hers) AND an MY19 M40i (mine). Both have identical
Bridgestone tires on 19" (premium on 30i; base on M40i) wheels.
The M40i is stiff, no question about it. I like it though sometimes it's annoying. The 30i is a sweetheart of a ride, though it can wallow a little.
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MY18 X3 30i:
Produced: 2018-03-15; Delivered: 2018-03-29
MY19 X3 M40i:
Produced: 2018-08-15; Delivered 2018-08-22
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