Mountain Bike Handlebar Stem Riser Extender Made from high-strength aluminum alloy, this handlebar stem riser is durable, corrosion-resistant, and designed for long-term use. It allows height adjustment using included spacers to achieve a comfortable riding position. The extender easily connects to the existing fork stem for a secure fit. Suitable for mountain bikes requiring increased handlebar height. Installation Instructions: 1. Insert the extender onto the fork stem and add spacers to achieve the desired height. 2. Align the stem and wheel in the same direction, then tighten the stem clamping bolts securely. Specifications: - Type: Handlebar Stem Riser Extender - Material: Aluminum Alloy - Base Diameter: 1 1/8" (28.6mm) - Tube Diameter: 28.6mm (standard) - Total Height: 120mm; 138mm (extended style) - Adjustable Height: 70mm / 100mm - Included Spacers: 4 Package Includes: 1 x Bicycle Handlebar Extender