The BySchulz Twist T12 can be mounted on a 1 1/8 inch steel ahead fork with an inner diameter of 25.4mm and is 12cm height adjustable. The fork allows for precise, tool-free height adjustment of the handlebars in seconds using the quick-release lever. The handlebars can also be rotated 90 degrees to the left or right. More about the function of a stem riser: The height of the handlebars is crucial for riding comfort. However, there is no ideal handlebar height. A different handlebar height is recommended uphill than downhill or for straight sections. Intuitively, differences are compensated with the arms and back. This is tiring and can lead to pain. This stem riser offers the solution by allowing the height to be easily adjusted as desired - even spontaneously, on the go. It can be adjusted for an upright or sporty riding position. Specifically designed for sporty city and trekking cyclists and e-bikers. Please note: available in 3 versions: 722259 - With sleeve for 39.5 mm stem 722260 - With sleeve for 41.5 mm stem 722261 - With sleeve for 44.5 mm stem riser - height adjustable Suitable for: 1 1/8 inch steel a-head forks with an inner diameter of 25.4 mm 12 cm height adjustable Precise, tool-free height adjustment Handlebars 90 degrees rotatable left or right Stem sleeve is available in 3 heights: 39.5mm / 41.5mm / 44.5mm BySchulz Article number: 722261 EAN code: 4251239300799 Retail packaging: Yes