The E-Series Pro tire is rated to be used on e-bikes traveling up to 25km/hour. However, there are increasingly more bicycles with pedal assistance that can go faster than 25 km/hour and for those bicycles the tires have to be specially approved. With the arrival of the CST E-series Pro, CST has set a new standard for e-bike tires.The carcass is extremely robust and the compound is specially made to generate less rolling resistance. Add to that the fast pattern and Double Breaker layer and this can justifiably be called a top-class product.