Please note: the clip diameter is F31.8mm (1.26 inch).Use a pair of sapcers(12*25.4mm) or (12.22.2mm),suitable for 31.8mm ,25.4mm and 22.2mm handlebar bicycle.if the bar is too small,you need shop an adapter install in it. Fashionable & Simple ---360 degrees rotating allow adjusting the display to the your best viewing angle, allowing safe hands-free phone access on the road.Convenient tool-free installation makes it easy mount to any Bicycle Handlebar, only need to locate and lock nut. Multiple Protections - Cushioning adhesive patch for clamp can reduce vibration as well as avoid phone surface scratches. Adjustable settings ---provides superb Universal Compatibility, fit for any phones/GPS of width between 2.17"-3.94",Compatible with iPhone MAX 8/ 7/ 6s/ 5c/ 5/,Compatible with Samsung Galaxy S9/S8/S5/ S4/ S3/,Compatible with Google Nexus 5 4(3.5in-7in ) cellphones and GPS. Super Durable & Stable --- All aluminium alloy frame makes it the strongest and most secure phone mount on the market. The Four Edges are designed with Eagle Claws,which make your mobile phone to be much better protected. The cross-shaped structure makes it fit the pedestal perfectly.