Shimano 105 5800 11 speed rear mech short cagethe shimano 105 5800 11 speed rear mech is super stiff for fast and accurate gear changes across the cassette featuresshort cageadvanced wide link design increases rigidity and shifting performancesuper stiff for fast and accurate changes across the cassettelarge 11 tooth pulleys increase service life and reduce noisesuper light shift actioncompatible with 11 speed drive trainscompatible with 23 28t sprocketsweight 232ga 2 year warranty is offered