Adaptor for GoPro that fits on a Cateye type tail light mount. With this part any suitable Cateye mount can now be used with a GoPro camera.
In this case the Cateye mount shown is the type that fits into the back of certain Fizik saddles.
This mount will suit most of the assorted Cateye mounts (including saddle rail, rear rack) shown here: http://cateyeamerica.com/Small-Parts/safety-lights
If used with the Fizik saddle mounting it is only possible to use the new GoPro HERO4 Session camera. If the traditional GoPro casing is used it will not be able to rotate down so that the camera faces rearward (it will point up at the sky at bit!).
Please check my store for a long version of this design that is suitable for use with the traditional GoPro case.