The SRAM XG-1090 cassette RED® Powerdome X™ delivers an undeniable performance advantage. The eight 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 & noise. Cutouts on the rear cog further reduce weight & add stiffness.
Features: Hollow steel dome makes for a stiff & lightweight gear cluster. Heat-treated, high-grade tool steel provide superlative durability & a beautiful finish Stealth Ring™ elastomers & advanced tooth profiles eliminate vibration & noise for a smooth, silent ride Aluminum cog: lighter, stiffer, stronger due to the choice of design, material & production process Specifcations: Technology Highlight (s): Powerdome X™, Stealth Ring™ Weight: 135g (11-23)
Material: High grade tool steel cog cluster, Heat treated aluminum, Lowest range cog, Elastomer rings Speeds: 10-speed rear / 2-speed front