The sram xg1190 11 speed cassette is the lighter and stiffer cassette that uses the combination from sram xx and sram red to give you a hollowed construction with cnc machined cogs and rear cut outs for shifting and has resulted in the lightest and stiffest cassette that sram has ever made the sram cassette has also been made with the stealthring technology that eliminates noise and vibrations thanks to the incredibly durable elastomers that have been placed between each cog the