In FH5 2022 Subaru BRZ is represented by a “Premium” trim. However, it appears that in game its rims are too big. Premium trim has only 17 inch rims available, only Limited trim has 18 inch rims. Judging by the design of the rims, those are Premium rims and they should be 17 inch. Game has them as 18 inch rims.
Images from Subaru configurator.
Premium trim with 17 inch rims -
Limited trim with 18 inch rims -
