Amazon.com : Promax Ahead System Adjustable Stem, Black : Sports & Outdoors Promax MA 579 Adjustable Threadless Stem 25.4mm, 110mm Length, Black Bontrager Adjustable Threadless Stem The Edge Cycleworks Shop Pro Adjust Stem Adjustable 20 to +40 now ROSE Bikes Bontrager Blendr Adjustable Threadless Stem Bicycle Centres of Bontrager Blendr Adjustable Threadless Stem Bolt Trek Bikes. Experience enhanced comfort and control on your rides with the Promax MA 579 adjustable threadless stem. Designed for convenience, this stem allows for easy adjustments without the need for tools, making it a perfect addition to your cycling gear. Durable aluminum construction for long lasting performance Adjustable stem angle range from 90 to 160 degrees for personalized fit Bar clamp diameter of 25. 4mm ensures compatibility with a variety of handlebars Streamlined black finish adds a sleek look to your bicycle Lightweight design minimizes added weight while maximizing strength This adjustable stem is ideal for cyclists seeking to customize their handlebar height for optimal riding posture and comfort. Simply rotate or adjust to your preferred angle, or remove it when necessary for maintenance or transport. Details: Length: 110mm Stack Height: 40mm SHIS Stem Clamp Diameter: 28. 6mm