The Boost has a 1cm rise to position your computer above short stems with steep upward stem angles. This is the ideal computer position for mountain biking’s wildest singletrack and rock gardens. Above the stem and out of harm’s way computer position. Simple and elegant, this mount replaces a 5mm spacer below the top cap. Fits 1-1/8” steerer tubes. FeaturesSupported Computers:Garmin 1050 And All Smaller Garmin ComputersWahoo BOLT, ROAM, And ACEHammerhead Karoo 2Made In Boise, Idaho, USALifetime Guarantee Against Material Or Manufacturing Defects (Damage Due To Abuse Or Crashing Excluded)Specifications1-1/8" Steerer tube Diameter, Thickness 5mm, Length (Center-to-Center) - 50mmCompatible with most steer tube tool kits.Dimensions: 11 × 20 × 4 cmMfr Claimed WeightGarmin & Wahoo - 21 g, Hammerhead - 25 g 1x W: Compatible with many 54-61cm size frames. Optimized for round 36T to 54T Chain Rings. Not compatible with oval chain rings. Fully adjustable for height, center-line, and angle. Optimized for 11 and 12 spd drivetrains.