Centre Hub section is flipped 180 degrees, so the wheel mounts inside out. Common on old grass autocrossing Minis, on cars with drum brakes, to give more offset. Not really JDm question this. You can also get reverse rim steel wheels. Essentially wheels usually give more width bias to the inside. Reverse rims give more bias to the outside; its origianlly done to overcome odd clearance problems, but hotrodders like it to give a wide look *they sed to cut the centree out, flip it over, and weld back in). I guess "full reverse rim" refers to the degree of offset/bias used.