Features1420 sprocket can only be used with 420 type chain to ensure stable use effect and give you a good experience 2Has the characteristics of toughness and durability. It is made of steel and has a long service life. You can use it with confidence 3With stable performance, reliability to satisfy you, professional technical manufacturing to meet your needs 4The diameter of the rear sprocket is 187mm/7.4in, the inner diameter is 52mm/2.0in, the the teeth number is 45 5Suitable for electric bicycles, karts, motorcycles, ATVs, four wheel off road vehicle,with a wide range of applicabilitySpecificationItem Type:Tooth Rear SprocketMaterial: SteelProduct Size: Diameter Approx. 187mm/7.4in, Inner Diameter Approx. 52mm/2.0inNumber of Teeth: 45Package List1 x ToothRearSprocket