19 in, Number of Bearing Bars 8, Tread Depth 9 3/4 in, Mounting Hole Spacing 7 in, Includes Mounting Hardware No, Mounting Hole Diameter 7/16 in, Mounting Hole Length 1 7/16 in, Mounting Hole Width 7/16 in, Number of Mounting Holes 4.188 in Bearing Bar Thickness, End Plate Height 2.5 in, Top Surface Smooth, Nosing Surface Checker Plate, Bearing Bar Spacing 1.