Specification:Type: Rear Axle KitShaft Overall Length (from end to end): 740mm (29 1/8″)The thickest part of the shaft is 22mm (7/8″)Chain and Sprocket: T8F 54TBrake Disc Diameter: 160mm (6 1/4″)Pillow block ID: 20mm(0.78″)Pillow block OD: 27mm(1.06″)Other Dimensions: As pictures shownBearing Hub ID: 18mm (0.70″)Bearing Hub 0D: 38mm(1.49″)Note: Installation Instructions is not included. Professional installation is recommended.Package includes:1 x Rear Axle Kit( with Brake Assembly,chain and other accessories)