Ergotec Adapter Up & Down 3 (25.4mm, height: 60 140 mm Black Sandblasted). Overview The Up & Down 3 adapter is a handlebar height adjusting system for Ahead stems. By means of a quick clamping and release mechanism all functions raising, lowering can be implemented with ease and without tools. During fitting the steer tube does not need to be milled, which has the advantage that the adapter can be removed again at any time. Attention: Only suitable for for steel steerer tubes. Specifications Safety Level: 4 Material: AL 6061 T6 Fork Clamp: 28. 6 mm Quill Length: 67 147 mm Clamp Height: 47 mm Finish: Black Sandblasted Weight: 328 g Assembly