3,500 lb. Electric Brake Flexiride Torsion Axle (72" Frame Width, 85" Hub Face) 3,500 lb. Capacity, 72" Frame Width, 85" Hub Face 5 Bolt - 4.5" Bolt Circle (2 5/8" Center Stud to Center Stud) Axle construction offers superior resistance to abrasive road elements, increasing the axle life. The high quality proprietary formula rubber guarantees a smoother ride and longer life. 10" x 2 1/4" Electric Drum Brakes (Some Assembly Required)