Mountain Bike Handlebar Front Fork Stem Riser Extender Extension Head Up Adapter Features: - Made of high-strength aluminum alloy, corrosion-resistant, non-deformable, and durable for long-term use. - Allows height adjustment using included spacers to suit rider preference. - Easy to install by connecting directly to the original front fork stem. - Designed for mountain bikes to raise the handlebar stem height. How to Install: 1. Insert the extender onto the fork stem and add spacers until desired height is achieved. 2. Align the stem and wheel in the same direction, then tighten the stem clamping bolts. Specifications: - Type: Handlebar Fork Stem Riser - Material: Aluminum Alloy - Base Diameter: 1 1/8" (28.6mm) - Diameter: 28.6mm (standard) - Total Height: 120mm; 138mm (extended style) - Adjustable Height: 70mm / 100mm - Includes: 4 spacers Package Includes: 1 x Bicycle Stem Extender