I am talking about the kits that are sold by the vendors for use on AD trucks.
The five lug car rotors they use are just over 11.125" and use a mid 70s mid size caliper. The six lug rotors are 11.875" and use a mid 70s truck caliper.
It appears the caliper may make up the difference in size, that is why I am asking if anyone knows whether or not the kits sold for AD trucks use the same brackets for the 5 lug kit and the 6 lug kit?