Welcome to our store!</br> 1、Made of high strength steel, high tensile steel plate is nickel chromium plated, using hardening technology, it has greater wear resistance, high temperature resistance, corrosion resistance, rust resistance, no deformation, high durability, and good impact resistance. 2、It provides fast and accurate indexing conversion function through special tooth form and slope. Irregular cutting angle tooth form is better compatible with various brands of transmission chains, and shifting speed sensitive and smooth. 3、Hollow design can easily reduce weight, reduce the burden of riding, achieve a good balance between strength and weight, and is easy to install and use. 4、Directly replace the old or damaged flywheel, easy to install, without any adjustment to the shifting system. Unique mountain bike chain design can well control the shifting function. 5、Independent small gear ring, the small gear of the bicycle cassette flywheel are often used during use, and the independent small gear design is convenient for future replacement and maintenance. <p class="wang-edit-text"><p class="wang-edit-text"> <p class="wang-edit-text"> <p class="wang-edit-text"> Item Type: 9 Speed Bicycle Flywheel Material: High Strength Steel Speed: 9 Speed Weight: Approx.421g/14.9oz Number of Gear Teeth: 11-13-15-17-19-21-24-28-32T <style> .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; }</style> 1 x Bicycle Flywheel 2 x Gear Ring 1 x Lock Ring (Customer Satisfaction) - is our priority. If you notice any problems with the products after receiving the goods, such as damaged goods or incorrect quantity, please contact us immediately. We will do our best to provide you with satisfactory after-sale service.</br>