669 18 30 Reinforced CVT Drive Belt Fits For Scooter Moped ATV QUAD 139QMB 1P39QMB 147QMD GY6 50 60 80 CC Short Case Engine

The outer circumference of this item measured by a flexible tape is approx. 683mm (26.89 inch) (The first number 669 does not represent the outer circumference of this drive belt is exact 669mm.) The second number 18 is nominal width.The actual width is approx. 17.8mm if measured by vernier caliper ( it is not accurate due to manual measurement.) The third number 30 means tooth angle is 30 degree. Application: GY6-50 60 80 cc 139QMB short-case 4 stroke scooters/ATVs Please check if the size of your old drive belt is 669-18-30 or 669-18.1 before purchase.