This stem is designed for e-bike H7P7. For other e-bikes, please confirm that your bike uses a 28.6 mm (1 1/8 inch) fork diameter and a 31.8 mm (1 1/4 inch) handlebar diameter before ordering. Key benefits - Strong, well designed and easily adjustable to avoid removing the handlebar stem and replacing it with a different angled stem. - Provides precise control over fit and riding posture with reliable performance. Size and compatibility - Available in three lengths: 90 mm, 110 mm, and 130 mm. The best length depends on your arm length and the position you find most comfortable. - Works with standard e-bike configurations as noted above. If your bike uses different dimensions, check compatibility before purchasing. Ease of installation and adjustment - Installation is straightforward because the specifications reflect real dimensions. - An angle indicator on the adjacent part helps you set the angle correctly. - The stem has an opening to view the handlebar position during setup. Practical notes - This stem offers good adjustability. Depending on handlebar thickness, spacers may be required. - If any wires feel loose after installation, apply glue to secure them. Use scenarios - Long city commutes: use a longer length and adjust angle for a more comfortable, upright riding position. - Mixed terrain riding: fine-tune reach and angle for better control on roads and light trails. - After upgrading handlebars: add spacers as needed to achieve the proper clearance and fit.