Gates G-Force C12 Carbon Fiber High Performance CVT Drive Belt 30C3750 Size: 1 5/16" x 38 5/8" Outside Circumference (in): 38.625 Outside Circumference (mm): 981 Top Width (in): 1.313 Top Width (mm): 33 Gates all-new G-Force C12 belt is a revolutionary breakthrough in CVT belt design The G-Force C12 belt is engineered for drop-in performance, featuring exceptional strength, flexibility, and durability Replaces OEM part numbers: 420280360, 715000302