Features1This is a bicycle small chain sprocket, made of good quality material. 213 teeth, the teeth distance is 12.7mm, the thickness is 3mm. 3Made of good quality carbon steel , sturdy and durable to use. 4Suitable for ordinary bicycles. 5Small size, lightweight. Very easy to install, and smooth performance.SpecificationFeatures:1.This is a bicycle small chain sprocket, made of good quality material.2.13 teeth, the teeth distance is 12.7mm, the thickness is 3mm.3.Made of good quality carbon steel , sturdy and durable to use.4.Suitable for ordinary bicycles.5.Small size, lightweight. Very easy to install, andsmoothperformance.Specifications:Condition: Brand NewItem Type: Pinion GearMaterial: Carbon SteelColor: as picture shown1016Z2 and Z3 reducer motor 13 tooth pinionNumber of teeth: 13Teeth distance: 12.7 mmTeeth Thickness: 3 mmInner diameter: 11 mmOuter diameter: 58 mmThickness: 9 mmBolt width: 4mm (fixed tip key width)Applicable chain: ordinary bicycle chain (model 1/2x1/8)Applicable motor: 1016Z2, 1016Z3, 1018 reducer motorPackage List1 x Pinion Gear