What is the maximum diameter that the CIO bike lights can be mounted on? Mille Stech Jensen January 05, 2021 10:59 Updated Front light: Ø50mm / 1.96 inch Rear light: Ø35mm / 1.38 inch Related articles Data Sheets Does the magnet mount on flat spokes? How much does the CIO bike light weigh? On which side of the bike should CIO be mounted? Does the light fit all kinds of bikes? Comments 0 comments Article is closed for comments.