K-Edge Garmin Race Stem Mount w/ Top Cap Adjustable BlackGreat upgrade solution for cyclists who prefer their computer above the stem Designed with mountain biking in mind, but also ideal for cyclocross, triathlon, or bike touring CNC machined aluminum for low weight and strength Compatibility: Garmin Edge 20, 25, 200, 500, 510, 520, 530, 800, 810, 820, 830, and Forerunner 310XT. 1 1 8 inch Steerer tube Diameter, Thickness 5mm, Length (Center to Center) 50mm Steerer mount replaces standard 5mm spacer on 1 1