Promax MA-579 25.4mm, Length 110m, Tool Free Adjustable Threadless Stem BlackThe MA 579 adjustable stem was developed for ease of use and the riders comfort in mind. This stem lets you easily rotate or adjust the handlebar height without tools for better comfort and control or remove it if necessary. Aluminum construction Stem Angle range: 90 160 deg Product Specifics Bar Clamp Diameter (mm): 25. 4 Color: Black Defined Color: Black Length: 110 Material: Aluminum S. H. I. S. Stem Clamp Diameter: 28. 6 Stack Height: 40 Today's