Easily mount your Flexframe compatible on multiple bikes with this essential extra. Features: Mounts quickly and easy Supports the transportation of the most common size u-locks Compatible with 13mm and 16mm round shaped shackles 360 degree rotation allows for the ability to micro-adjust Heavy-duty soft strap system contours to bike frame Product dimensions: fits bicycle frame tubing 25mm to 80mm whether round oval triangular or square shapes Product weight: 0.18 kgs