SRAM XG-1190 X-Dome 11-Speed Cassette, 11-25T

This incredibly innovative design is the most advanced cassette ever made. It is super light, deadly silent, and delivers an undeniable performance advantage. The nine cogs in the middle are machined from a single block of high grade tool steel, increasing stiffness while weighing even less than a titanium cassette. Between each cog in the block is a Stealth Ring elastomer to reduce vibration and noise.

150gm ( ),Hollow machined cluster,Stealth Ring noise damping bands,Lighter and stiffer than a Ti cassette