Description:Wheel mounts on the front axle, provides support to the machine through wheels, and transmits power to the ground.Attributes:• Material: Steel• External Spline Number of Teeth: 151• Spline Pitch Diameter: 639.233 mm (25.166 in)• Outside Diameter: 1290 mm (50.787 in)• Inside Diameter: 390 mm (15.354 in)• Length: 503.8 mm (19.834 in)Application:Consult your owner's manual or contact your local Cat Dealer for more information.