The new EKAR GT is easier to pedal and provides a widerselection of gear combinations than previous iterationsWith multiple 13-speed cassette options, ranging from pro to newcomer, theres a gear combination perfect for any rider**10-48t is NOT compatible with previous EKAR generation derailleurs - Only compatible with EKAR GT Derailleurs10-48t13sp10,11,12,13,14,16,18,21,25,30,36,42,48SilverCS25-EKGT1308N3WUPC/EAN/GTIN: 8055136024415