?Please Measure Your Saddle Bow?The bike saddle bow must meet the requirement that the center distance of two mounting points is 53-58 mm. ?Stable and angle adjustable? Designed with gears on the connect holes of the saddle bow clip and the connector, makes it remains stable even on rough roads once you install it tight, and also you can adjust the angle of the radar taillight freely as you need. ?Quick & Easy to Install?Easy to assemble and adjust with the supplied screws and hex wrench, also come with user manual that easy to understand. ?Safe Riding? This mount allows you to mount the radar under the bicycle saddle, it keeps the radar in a higher position than on the seat post, so that the radar sensibly detects arriving cars better, provides visual and audible alerts to warn of vehicles approaching. ?Solid and Durable? The saddle bow clip that fixed to your bicycle is made of high quality aluminum alloy material, can be fixed under your bicycle saddle firmly, solve the problem of losing the radar due to unstable fixing on the seat post. ?Perfect fit?Specially designed for Garmin Varia RCT715. Varia RCT715 is bigger and heavier than the previous models, the special design of our saddle bow mount make it have better load-bearing, can hold your RCT715 firmly on the bicycle saddle bow.