Front Sprocket - To fit Revvi E-250w, 12" and 16" kids electric bike Please note: This will only fit 12" bikes with a 100w or 170w brushed motor and 16" bikes with a 170w brushed motor Front Sprocket - To fit Revvi E-250w, 12" and 16" kids electric bike£3.99PriceSprocket size SelectQuantityAdd to Cart