Top-quality high-performance disc brake kits that are especially resistant to corrosion. They feature vented stainless steel rotors, heat-shedding aluminum calipers with long-wearing ceramic brake pads, a rotating swivel brake line connector to make installation easy and stainless steel caliper slider pins with oil-impregnated bronze bushings that wont rust or corrode. Two kits required per axle. G5 Stainless Steel Disc Brakes Model Wheel Diameter Rotor Diameter Max. Hub Capacity Bolt Circle Diameter Hub Bearing Size 11954682 13", 14", 15" 10' 1,750 lb. 4 1/2" 5-Lug 1 1/16" & 1 3/8" 11954690 14", 15" 12' 3000 lb. 5 1/2" 6-Lug 1 1/4" & 1 3/4"