Southwest Wheel 8-Hole, 6.5" Bolt Circle Brake Drum for 7,000 lb Axle 8 studs 6.5" bolt circle using 25580 inner and 14125A outer bearing. Contains inner bearing, outer bearing, seal, grease cap and lug nuts. Fits a #42 Spindle Drums are pre-raced & pre-studded. For use with 12" drum brakes 1/2" studs