Cut to fit 31 spline axles for Ford 9" rear ends are a great alternative to custom axles for street, drag racing and circle track use. Axles are drilled for .687" press-in style wheel studs and have multiple wheel bolt patterns for 5 on 4.5", 4.75 and 5" bolt circles. Axles have .470" thick flanges with a 5.94" outer diameter and a 3.06 hub register to center most rotors and drums. 31-spline axle has a 3.150" O.D. bearing installed for housing with Big Ford (New Style) ends, a press-on sleeve to retain bearing to the axle and an axle retainer. Wheel studs sold separately.