5.25 Inches

EASILY ATTACHES TO BICYCLE SPOKES - This bright bike wheel light presses and slides securely into place on common 3-spoke cross pattern wheels, regardless of the size or type of bike. Attach and ride confidently CHOOSE YOUR COLOR DISC-O SELECT LED - With Disc-O Select LED technology, you can choose the color of your light with the press of a button, or leave it cycling through color-changing Disc-O mode BUILT TO WITHSTAND THE ELEMENTS - These bicycle lights are weather and shock resistant and are housed in a tough plastic casing, so they can handle whatever Mother Nature dishes out on your ride