Niterider Taillight Strap Mount (with Aero Post Groove) The Nite Rider® Adjustable Angle Tail Light Strap Mount was specifically designed for Niteridersflagship tail light, the Sentinel. It means that you can fine tune the mounting angle of the light to display the projected Laser Lanes even & parallel on the ground. Its an easy on & off non-slip tail light mount that also features a grooved contact pad that makes this the go to mount for riders using aero seat posts. SYSTEM COMPATIBILITY Niterider Sentinel Niterider Solas Niterider Sabre Niterider Cherry Bomb