Cogged & Non-Cogged V-Belts, Serpentine, Banded
31.8mm (1 1/4 in) 32.94mm (1.297 in) 31.83mm (1.253 in) SAE effective length for COG and NON-COG belts equals: Outer circumference minus 9.65mm (0.38 in) for 3/8 inch and 1/2 inch belt sizes. Outer circumference minus 14.48mm (0.57 in) for 11/16 inch and larger belt sizes.