REACT 9-Speed HG Cassette 4-Pack saddles and seat covers MAX Laser cut ventilation holes

MAX Laser cut ventilation holes throughout entire palm for breathe-ability - so many we lost count

Single sweep compression adjuster lets you lock out for climbing and open it up for full gas sending

FS-LYRK-ULT-D1

Does not fit Shimano 12-Speed

REACT 9-Speed HG Cassette 4-Pack saddles and seat covers MAX Laser cut ventilation holesWith the REACT series, KMC has filled a gap in its lineup of drive solutions. Just like KMC chainrings and sprockets, REACT cassettes are precisely designed to match KMC chains. This perfect synergy reduces friction between individual components and enhances the lifespan of all drive components. Meticulously crafted ascent and descent ramps ensure precise chain guidance, improving shifting performance across the entire range. Made from high strength