An excellent choice for mountain, cross, and road cyclists who prefer to have the computer above the stem- Far and away more advanced than the plastic options on the market- Boost Stem Mount is specifically designed to fit atop the shortest stems on the market today- The Gravity Cap replaces your existing top cap and is ideal for Downhill, Enduro, Gravel, Touring, etc- The mount replaces a standard 5mm spacer and is locked securely in place by the top cap compression system- Compatibility: Wahoo ELEMNT, Wahoo Roam, Wahoo Bolt, Wahoo MINI- CNC-machined aluminum for low weight and strength- Made in the USA with a lifetime warranty5mm height, Fits under Specialized Control SL top cap or with K-EDGE Ultralight Top Cap- Designed specifically for the Roval Control II, Roval Control Riser Integrated Cockpits and Roval Alloy XC Stems- Originally included on select S-Works Epic 9 models, this mount is now available for Epic 9 Pro, Expert, and Comp owners looking for the same factory set- up