Call me brave but I stumbled across them and then crossed them for my front wheels. I appreciated the instructions about checking the torque after the first run. Be sure to do this if you think you've already been through a lot. I checked mine again after 200 miles and my 1st autocross run. The nuts between the hub and the spacer have not moved or loosened, the lug on the rims has loosened a little but has not been tightened. I would recommend using a screwdriver on the rotor fins as a stop (against the caliper bracket). Torque manual, I did 80ftlb + 15 degrees