Where can I find the PIN number? The PIN number is on a black business card in the box with the crank. If you cannot find it, write an e-mail to email@example.com or use a contact form, giving the SN number of your meter. Tagged: lost my pin numbermobile appmobile applicationpin number Related Articles How to install the app? What allowes the app? How to update firmware in my device? What is “ZWIFT compatibility” in mobile app? I cannot add my device to the app. How can I check the firmware version of my POWERCRANK?