Wheel arche extension ( WAE ) is big enough for wheels up to:

10 x 20 OS 35 w. 255/35 R 20 or 265/30 R 20
10 x 21 OS 30 w. 275/25 R 21

Attention:
Wheel clearance must be checked and adjusted as needed before installation/bonding! If necessary, the rear fender liner may need to be widened by approximately 20–25 mm using a fender flare machine in the area of ??the wheel center, 25 cm in the direction of travel, and 10 cm in the opposite direction. The required modifications may vary depending on the lowering kit used, tire brand, and design. Therefore, any desired lowering kit must be installed before fitting the wheel arch extensions

We recommend to fix mot stone throw protection film ( 3M ) after painting,
in the areas where rock fall can happen.

Illustration is an example. The item is not painted.