The Shimano 105 CS-R7101 is a wide-range 12-speed road cassette built on Shimano's HYPERGLIDE+ tooth profile — delivering fast, seamless shifts under load whether you're sprinting on the flats or grinding up a climb. A refined 12-step gear progression keeps your cadence smooth and efficient across every situation.

Freehub compatibility: The CS-R7101 fits both standard Shimano 11-speed road freehub bodies and 12-speed (HG L2) freehubs, so in most cases you can keep your existing road wheels. It pairs with Shimano 12-speed road drivetrains and an HG 12-speed road chain.

Key Specifications

• Model: Shimano 105 CS-R7101 (R7100 series)
• Speeds: 12-speed
• Gear range: 11-34T (wide-range road)
• Cog combination: 11-12-13-14-15-17-19-21-24-27-30-34T
• Freehub type: Shimano HG — fits 11-speed & 12-speed road freehub bodies
• Compatible chain: Shimano HG 12-speed road chain
• Material: Steel cogs / aluminum lockring & carrier
• Weight: 361 g (12.7 oz)
• Color: Silver

Technology Highlights

• HYPERGLIDE+: Computer-designed tooth profile with contoured shift gates for crisp, smooth shifts even under full pedaling load.
• Refined 12-step gearing: Close ratios for efficient cadence control plus a 34T climbing gear when the road tilts up.
• Lightweight build: Largest sprockets on a lightweight alloy carrier; cut-away, drilled cogs reduce weight without sacrificing rigidity.

Who It's For

Road and endurance riders running a Shimano 12-speed road group (105 R7100, Ultegra R8100, or Dura-Ace R9200 — Di2 or mechanical) who want a versatile, climb-friendly 11-34T range that bolts onto existing 11-speed road wheels.

What's in the Box

• 1 x Shimano 105 CS-R7101 12-speed cassette (11-34T)
• 1 x lockring

Condition & Shipping

• Condition: Brand new in retail packaging
• Ships from: Ontario, California (US domestic)
• Estimated delivery: 3–5 business days
• Returns: Free 30-day returns