A view without the wheels installed to show the hub and disc brake/caliper. Recent rains along w/the truck having been stationary for a few days caused the surface oxidation. The brake rotors were Cryotuned (a deep freezing process to re-align the crystaline structure of the metal) for strength and longevity. This process is being used by NASCAR teams on many of the different components of the cars for huge benefits. Edward's Heat Treat in San Leandro, CA was kind enough to offer this serv