Features1This type of wheel is used for electric scooters and has no teeth. 2Easy to use, stable performance, simple operation. 3High strength and durability, provide good usage experience. 4Professional manufacturing, high quality and reliability. 5Convenient to instal and use, sturdy and durable.SpecificationItem Type:Electric ScooterFree WheelMaterial: metalColor: As picture shownWeight: Approx. 155gNumber of holes: 4 holesInner diameter: Approx. 34mm/1.3inOuter diameter: Approx. 78mm/3.1inThickness: Approx. 15mm/0.6inHole diameter: Approx. 6mm/0.2inHole distance: Approx. 46mm/1.8in (center distance between two adjacent holes)Diagonal: Approx. 65mm/2.6in (center distance between two holes diagonally)Thread: mefric positive threadApplicable sprocket: Electric scooter deceleration sprocket 54 (T8F), 55, 65, 80 (25H), etc.Applicable models: electric scooter, bicyclePackage List1 xFree Wheel