Fiido C21 Control Panel, final May 31, 2023 2560 × 1442 The Fiido C21 Pro e-Gravel bike Fiido C21 Pro e-Gravel bike control panel and handlebar buttons. Fiido C21 Pro e-Gravel bike control panel and handlebar buttons. Please rate this post by clicking on the desired star (1 = Awful, 5 = Excellent) [Total: 0 Average: 0]