GoPro Handlebar, Seatpost and Pole Mount (Official Accessory)

Amazon

Hinged, non-slip design sets up in seconds and clamps to any 0.35 to 1.4in (9 to 35mm) diameter tube Rotating base features 360° rotation with 16 secure positions, ensuring the perfect angle and allowing rapid changes in perspective for more dynamic footage The mounting buckle lets users move their camera between mounts on the fly, enabling fast and easy changes in perspective Durable construction prevents slipping and breaking and minimizes vibration and camera shake Compatible with all GoPro HERO Cameras

Snowcountry

Camera Mount for Bicycles, Ski Poles + MoreSets up in seconds + clamps easilyMount your GoPro to handlebars, seatposts, ski poles and more. The hinged design easily clamps to different mounting locations. The mounting base rotates 360° to give you different camera angles at the push of a button and lets you move between mounts quickly. Fits 0.35 to 1.4in (9 to 35mm) diameter tubes.