RAM Part RAM-B-149ZA-C1U : For our customers that are looking for a serious heavy duty bike mount.  This mount comes with everything needed to mount your camera.  No modification to your camera is needed to use this heavy duty metal mount as this uses a standard 1/4"-20 mounting stud coupled with a short 1.75" arm.  This is the best you can buy manufactured by RAM Mounting Systems. Fits handlebar diameters up to 1.25 inches.