BYD Tang 2025 Rim Question

Hello, im buying a second set of rims for my 2025 BYD Tang EV, its factory rims are 21" with 265/45, and i have gotten a great bargain on some rims, but im not sure of the ET value needed? i read 42 somewhere but its hard to find concrete info. And the rim manufacturer warned about the large Brembo brake calipers on the Tang.