Shimano Ultegra CS-R8101 12 Speed Cassettes

The Shimano Ultegra CS-R8101 is a 12-speed HyperGlide+ road cassette for road and allroad / gravel bikes, available in 11-30T and 11-34T. HyperGlide+ technology gives smooth shifting in both directions across the entire gear range, so riders can focus on climbs and sprints. The 12-speed cassette is also compatible with Shimano’s previous 11-speed freehub bodies.

• Smooth upshifts and downshifts, even under maximum effort
  
• Quiet cruising with seamless shifting
  
• Choice of 11-30T or 11-34T gear range
  
• Larger teeth maintain maximum efficiency
  
• Fits Shimano’s previous 11-speed freehub bodies
  
• Lightweight, at approx. 291 g (11-30T) or 345 g (11-34T)

• HyperGlide+ technology: Shifting ramps guide the chain to the next larger sprocket and also prevent the chain from dropping when shifting down. The result is smooth, consistent shifting without vibration or disrupted cadence.
  
• 12-speed design: Provides 12 gears at the rear.
  
• Two gear ranges: 11-30T and 11-34T versions are available.
  
• Freehub body compatibility: Works with HG L (Shimano 11/12s Road) and HG L2 (Shimano 12s only Road) freehub bodies.
  
• Nickel-plated steel sprockets: Steel sprockets with nickel plating.
  
• Aluminum spider: The spider is made of aluminum.
  
• Anodized aluminium lock ring: The lock ring is made of anodized aluminium.

• Brand: Shimano
  
• Model: Ultegra CS-R8101
  
• Series: Ultegra (R8100)
  
• Use: Road Bike, Allroad / Gravel
  
• Speeds: 12
  
• Technology: HyperGlide+
  
• Gear Ranges: 11-30T, 11-34T
  
• Tooth Combination (11-30T): 11-12-13-14-15-16-17-19-21-24-27-30
  
• Tooth Combination (11-34T): 11-12-13-14-15-17-19-21-24-27-30-34
  
• Freehub Body: HG L (Shimano 11/12s Road), HG L2 (Shimano 12s only Road)
  
• Sprocket Material: Steel (nickel plated)
  
• Spider Material: Aluminum
  
• Lock Ring Material: Aluminium (anodized)
  
• Color: Silver
  
• Weight (manufacturer’s specification): approx. 291 g (11-30T), approx. 345 g (11-34T)
  
• Compatible Rear Derailleurs: RD-R9250, RD-R8150, RD-R7150 (11-34T only)
  
• Compatible Chains: CN-M9100, CN-M8100, CN-M7100, CN-M6100