Our Direct Mount Stem was developed specifically for the needs of our World Cup DH athletes. Itâ€s a simple design with a 0mm stack that can be adjusted up to 10mm rise with the Spacer Kit. Only available in one length, 45mm, and one speed: fast. Product Specs: Clamp Diameter: 35mm Clamp Width: 60mm Length: 45mm Weight: 155g Material: 6000-series Aluminum Alloy Finish: CNC-machined, black anodized Stack: 0mm-10mm Things you Should Know This stem is designed to be the perfect companion to the OneUp Carbon E-bar, the OneUp Carbon Handlebar, and the OneUp Aluminum Bar. However, this stem will also fit other 35mm diameter bars. What's in the Box 1x Direct Mount Stem 4x Pre-Installed Bar Clamp Bolts 4x Direct Mount Bolts Note: Spacer Kit sold separately (available late 2023).