The Shimano Ultegra CS‑R8000 is a lightweight, high‑performance 11‑speed road cassette designed for smooth shifting and efficient power transfer. Its largest cogs are mounted on alloy and composite spiders to reduce weight while maintaining stiffness. The nickel‑plated finish improves durability, and the aluminum lockring keeps the system secure. The 11‑34T version is compatible with both 10‑ and 11‑speed freehub bodies when used with the correct spacer. Technical Specs: Largest cogs mounted on alloy and composite spiders Aluminum lockring Nickel‑plated finish for durability Range: 11‑34T Speed: 11‑speed Freehub compatibility: 11‑34T fits 10‑ and 11‑speed freehub bodies (1.85 mm spacer required for 11‑speed road); all other sizes fit 11‑speed road hubs only Weight: 335 g Cog details: 11‑13‑15‑17‑19‑21‑23‑25‑27‑30‑34 Finish: Chrome Spider material: Aluminum Technology: Hyperglide EV Cog material: Steel Ideal for: Road cyclists seeking a reliable, lightweight and smooth‑shifting 11‑speed cassette for performance riding, training or upgrading an existing drivetrain.
