RSR and SC trailing arms locate the wheel flange in the same location. Pick up point and caliper location aside, turbo trailing arms locate the wheel flange about 2” more outboard, not allowing RSR dimension 11” wheels to fit without sticking way out of the fender. Your forward mounted calipers tells me you have SC type rear arms.
Note 11” BBS wheel on the back of my car with RSR flares and turbo arms, no deep offset in the rims.
