Classical-Fractional V-Belts

Classical Belts: Measured in inches. Part numbers go by the belt's inside circumference. To find this, measure outside length of belt and subtract. A/4L Subtract 2, B/5L Subtract 3, C Subtract 4, D Subtract 5, E Subtract 6. Example: A14 = 16 inches (OC). 3L is an exception. Measure 3L’s outside length & multiply by 10. Example: 3L130 = 13 Inches.