Shifter - 1:1-Tech - Aluminum shift lever - Shift cable with hyper low-friction coating - 120g Rear Derailleur - Maximum compatible sprockets: 50T - Shadow RD with slant design - 295g Chain - Size: 1/2" X 11/128" - Links: 116 links - 265g Cassette - Cassette Cogs: 11-50T - Carrier Material: aluminum - Cog Material: nickle-plated steel - 500g