4iiiiBluetooth Shimano Dura-Ace

At4iiii Innovations they strive to empower athletes by providing them with all the tools they need to get the most accurate results. 4iiii creates the potentiometers that help cyclists train for a better personal result or for a place on the podium. The4iiii products have been proven to be the best in the world, based on customer feedback and third-party testing.