Wonderful flywheel for your bicycle.<br><br><strong>Features:</strong><br>9 speed cassette flywheel.<br>Number of teeth on each floor:11-12-14-16-18-21-24-28-32.<br>Can be applied in mountain bike, bicycle, tricycle, electric vehicle etc.<br><br><strong>Specifications:</strong><br>Color: Silver<br>Material: Steel<br>Dimension: 13 * 13 * 4.1cm / 5.12 * 5.12 * 1.61in<br>Weight: 372g / 13.14oz<br><br><strong>Package List:</strong><br>1 * 11-32T Cassette Flywheel