Made from tough high-grade tool steel and benefitting from SRAM's advanced PowerdomeX construction, the SRAM Red 22 XG-1190 11 Speed Cassette (A2) ensures your drivetrain shifts cleanly and swiftly as you're powering up to speed. The SRAMXG1190 road bike cassette is super light, deadly silent, and delivers an undeniable performance advantage. The nine cogs in the cog cluster are machined from a single block of high-grade tool steel, increasing stiffness while weighing even less than a titanium cassette. Between each cog is a StealthRing elastomer to reduce vibration and noise. Cutouts on the rear cog further reduce weight and add stiffness. It's the final piece in the drivetrain puzzle, paired with the new SRAM Red Rear Derailleur, delivers ultra-fast, ultra-quiet shifts that will always put you in the right gear.