You need to check the inner clearance you have now (assuming you are on factory 8x19 et45 with 235/40) as the setup you are wanting to run will b approximately 10-15mm closer on the inner and outer.
I have ran 245/30/20 on a 20x10 et40 and
235/30/21 on a 9.5x21 et 39
Based on my experience the tyre may be close to the strut.
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