AF started requiring BL after a racer in AF had a tire come off a rim While backing up, Zero ivestagation as to low/leaking air pressure, damaged rim, no screws, Just some Screwball tech wannabe throwing out a bad solution. Having worked on many N/TF cars and knowing the clearence between caliper and rim was tight, I questioned him how that was going to work with a 1" smaller dia wheel?? Strange already has a smaller dia rotor because they use the same rotor for everything. The M/W and SPE units all were running the larger dia rotor. Racers were grinding on the calipers and the beadlock rings to get to fit untill those companys made the smaller rotors and caliper mounts.
No Manuf. makes a suitable rear tire for AF in a 16" dia and the 15" NASCAR liners are not wide enough