Shimano 105 CS-R7101-12 Cassette

Shimano 105 CS-R7101-12 Cassette

Unlock continuous momentum and seamless cadence control on every road ride. The Shimano 105 12-Speed Cassette brings elite-level electronic (Di2) and mechanical shifting performance to an accessible, highly reliable package. Designed for modern endurance road bikes, gravel builds, and steep alpine climbs, this cassette ensures you never run out of gears when the road tilts upward.

Featuring refined Hyperglide+ tooth profiles, the CS-R7101 enables smooth, predictable gear changes even under hard pedaling efforts. Crucially for riders upgrading their setups, Shimano engineered this 12-speed cassette with backward compatibility in mind: it mounts directly onto standard Shimano HG 11-speed freehub bodies (HG-L) as well as newer 12-speed road freehubs (HG-L2). This allows you to upgrade your drivetrain without having to replace your trusted wheelset.

Key Technologies

• Hyperglide+ Shifting: Engineered with precise gear ramps to guide the chain up and down the sprockets without loss of momentum. Experience faster, quieter shifts even when putting power down during out-of-saddle efforts.

• Broad Freehub Compatibility: Fits both traditional Shimano/SRAM 11-speed HG freehubs and 12-speed road-specific freehubs, making drivetrain upgrades straightforward and cost-effective.

• Di2 & Mechanical Compatible: Engineered to work seamlessly with modern 12-speed Di2 electronic rear derailleurs as well as 12-speed mechanical road setups.

• Plated Steel Sprockets: Built with 12 high-strength nickel-plated steel cogs for long-lasting wear resistance and durability against the elements.

Ratio Options for Your Riding Style

Choose between two wide-range options engineered to keep your pedaling rhythm fluid across rolling hills and steep climbs:

1. The 11-34T Ratio (CS-R7101-12 - Standard Road / Endurance Spec)

• Best Suited For: All-around road riding, fast group rides, and rolling terrain where tighter gear steps are preferred to maintain optimum cadence.

• Gear Steps: 11-12-13-14-15-17-19-21-24-27-30-34T

• Weight: ~361 g

2. The 11-36T Ratio (CS-HG710-12 - Extra-Wide Range / Alpine & Gravel Spec)

• Best Suited For: Steep alpine passes, bikepacking trips, endurance routes, and gravel setups where a low 1:1 (or lower) climbing gear is necessary.

• Gear Steps: 11-12-13-14-15-17-19-21-24-28-32-36T

• Weight: ~391 g

Technical Specifications

• Model Series: Shimano 105 R7100 Series

• Speed Compatibility: 12-speed

• System Type: HG 12-speed (Hyperglide+)

• Spider Construction: Aluminum spider arm for the largest cogs

• Sprocket Material: Nickel-plated steel (all 12 cogs)

• Freehub Interface: HG-L (Standard 11-speed Road HG) & HG-L2 (12-speed Road)

• Compatible Chain: HG 12-speed (e.g., CN-M7100, CN-M6100, CN-M9100)

Pros & Cons

• Exceptional value delivering top-tier 12-speed Hyperglide+ shifting performance at a budget-friendly price point

• Backward compatible with standard 11-speed HG freehubs, saving you from buying a new wheelset

• Wide-range gearing options (34T and 36T) provide generous climbing gears for steep gradients and long endurance days

• All-steel sprocket construction offers excellent long-term durability and resistance to wear

• Fully compatible with both Di2 electronic and mechanical 12-speed drivetrains

• Slightly heavier than Ultegra or Dura-Ace equivalents due to the solid steel sprocket design

• Does not include a 10T small cog (utilises a standard 11T top gear for compatibility with traditional HG hubs)

CS-R7101-12 User Manual

Shimano Warranty

All product warranties are in accordance with the manufacturer's policy (see link in the product details above). In most cases, this is a limited warranty that applies only to the original owner and excludes normal wear and tear, accidental damage, negligence (failure to clean/maintain the product), and improper installation (see User Manual link in the product details above). However, if you experience a problem with the product you purchased from bicyquel _ (original invoice required), please let us know so we can assist you with the appropriate procedure.