Please try to understand that every vehicle can go 2 steps ahead of stock wheel size, which is normal and is globally done.
For example, 15” can go till 17”, 13”can go till 15”, 16” can go till 18” and so on.
But the tires installed are low profile tires with theses large diameter rims such that the total wheel diameter stays close to stock wheel diameter size.
Like in my case, I have used 205/40 r17 tires on my 17” alloy rims. This low profile tire selection brings my total wheel diameter to very close of stock wheel dia meter with only 0.5 inch increase. So, no issue with fuel economy, diving and steering.