O-Ring Drive Chain with Front and Rear Sprockets. Note: It only fits for USA model. 1. O-Ring Drive Chain with Master Link (Tensile Strength of 8200 pounds) O-Ring Style means it will last longer with less maintenance than conventional chain. 2. Front Sprocket 15 Teeth 3. Rear Sprocket 38 Teeth. We strongly suggest comparing the posted picture to your faulty unit.
