[. . . ] The NVO Components stem is ATS (Adjustable Threadless System) compatible allowing for easy height adjustment with threadless headset systems. [. . . ] You may cut your steer tube, or you can install stack washers on top of the headset to raise the ATS shim above the steer tube. If the ATS shim needs to be cut, mark the ATS shim approximately 2-3mm above the top edge of the steer tube. nOTE: Most carbon steer tube compression devices rest on the top edge of the steer tube. Be sure to compensate for this added height when determining where to cut your ATS Shim. Carefully position the ATS shim so that the cut line is above the steer tube and the steer tube does not accidentally get cut. Clamp the ATS shim cutting tool over the shim and steer tube with the saw blade slot over the cut mark (Fig. Hold fork with suitable clamping device that will not damage steer tube to perform the cut. If the steer tube compression device is near or above the cut mark, drive the compression device lower in the steer tube. [. . . ] All warranties will be void if the items are damaged due to incorrect installation, rider abuse, crash, alterations, modification, or used in any way not intended as described in this owner's manual. [. . . ]