Feature 1This is a bicycle or tricycle general mechanical speedometer, it is a high-quality bicycle equipment made of durable aluminum alloy. 2Pure mechanical bike computer, not only has good quality, but also has accurate data. 3It works for 26/27.5/28/29 inch bikes only, be sure to check your bike size before you buy it. 4Our product accessories are complete and easy to install, you can do it by yourself without any effort. 5The must instrument you should need for your bike journey, and you'll find it useful.Features: This is a bicycle or tricycle general mechanical speedometer, it is a high-quality bicycle equipment made of durable aluminum alloy. Pure mechanical bike computer, not only has good quality, but also has accurate data. It works for 26/27.5/28/29 inch bikes only, be sure to check your bike size before you buy it. Our product accessories are complete and easy to install, you can do it by yourself without any effort. The must instrument you should need for your bike journey, and you'll find it useful. Specification: Condition: Brand New Material: Aluminum Alloy Color: Black Size: Approx. 11 * 8 * 8 cm / 4.3 * 3.1 * 3.1 in Weight: Approx. 333 gInstallation Conditions: A quick release lever or a large front wheel clearance is required for installation. Package List: 1 * Bicycle Computer Note: Only the Bicycle Computer, bike others are just Photography Props. .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }