Shimano Ultegra 11 fach Kassette Cass 11-25t CS-6800 Rennrad Close Ratio
Shimano Ultegra Cassette. For use with any 11 speed chain but works best with shimano. Lightweight close ratio cassette. 11-25 Ratio. This will work with any 11 speed system. Next 2 are on a carbon composite spider.