Optimise your efficiency & comfort by fine-tuning your stem angle with this adjustable & economical stem.3D-forged & CNC-machined 6061 aluminium road/MTB-compatible stem 4-bolt oversized 31.8mm handlebar interface with relieved faceplate Equipped with top cap & 4-degree 2-degree & 0-degree shims Available in 12-degree 17-degree & 24-degree angles 12-degree: 10 position angle range: +/- 8-degree to 16-degree in 2-degree increments 17-degree: 10 position angle range +/- 13-degree to 21-degree in 2-degree increments 24-degree: 10 position angle range: +/- 20-degree to 28-degree in 2-degree increments Compatible with composite handlebars