EKAR 13 speed cassettes are optimized for 3 different riding options including endurance, gravel race and gravel adventure Ranges and steps designed specifically with the ability to perform on and off the beaten path 9-42t13sp9,10,11,12,13,14,16,18,21,25,30,36,42SilverEKAR CS21UPC/EAN/GTIN: 8053340455469