Shimano Ultegra CS-R8101 12-Speed Cassette – Hyperglide+ 11-30T / 11-34T

Shimano Ultegra CS-R8101 12-Speed Cassette – Hyperglide+ 11-30T / 11-34T

11-30T
$109.99 AUD
Sale price  $109.99 AUD Regular price 
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Shimano Ultegra CS-R8101 12-Speed Cassette – Hyperglide+ 11-30T / 11-34T

Shimano Ultegra CS-R8101 12-Speed Cassette – Hyperglide+ 11-30T / 11-34T

$109.99 AUD
Sale price  $109.99 AUD Regular price 
Taxes included. Shipping calculated at checkout.

The Shimano Ultegra CS-R8101 12-Speed Cassette delivers smooth Hyperglide+ shifting, refined road gearing and excellent drivetrain efficiency, making it one of the best-value premium cassette upgrades for Brisbane and Australian riders wanting fast shifting, dependable climbing range and long-lasting Shimano performance.

CS-R8101 Features

  • Shimano Ultegra 12-speed road cassette with Hyperglide+ shift technology
  • Available in 11-30T and 11-34T ratios for racing, endurance and climbing
  • Compatible with Shimano HG 12-speed chains
  • Fits Shimano 12-speed and compatible Shimano road 11-speed freehub bodies
  • Excellent value alternative to Dura-Ace with proven Ultegra performance
Cassette Gear Ratio
Key Features & Technical Specifications

Technical Specifications

  • Product Name: Shimano Ultegra CS-R8101 12-Speed Cassette
  • Model: CS-R8101-12
  • Series: Shimano Ultegra
  • Cassette Type: Hyperglide+ road cassette
  • Rear Speeds: 12-speed
  • Compatible Chain: Shimano HG 12-speed
  • Available Ratios: 11-30T and 11-34T
  • Average Weight:11-30T: approximately 291g11-34T: approximately 345g
  • Freehub Compatibility: Shimano 12-speed road and compatible Shimano road 11-speed Hyperglide freehub bodies
  • Recommended Drivetrain: Shimano Ultegra R8100 / R8150 12-speed, Dura-Ace R9200, 105 R7100 and compatible Shimano 12-speed road systems
  • Recommended Use: Road cycling, endurance riding, climbing, bunch rides, racing, Gran Fondo events and high-mileage training
  • Compatible Bike Type: Road bikes, aero road bikes, endurance road bikes and performance all-road bikes
  • Colour: Shimano Ultegra series finish
  • Rider Weight Limit: Not applicable

Gear Ratio Options

11-30T

  • Best for racing, fast bunch rides and flatter terrain
  • Tighter gear steps for smoother cadence control
  • Lighter option for performance-focused road builds

11-34T

  • Best for climbing, endurance rides and hilly routes
  • Wider range for steep gradients and long days in the saddle
  • Ideal for riders wanting easier climbing gears without changing chainrings
Notable Tech, Materials & Construction

Hyperglide+ Shifting Technology

Shimano Hyperglide+ technology is designed to deliver faster, smoother shifts up and down the cassette, even while pedalling under heavy load. This helps riders shift confidently during climbs, sprint efforts and high-cadence changes without needing to ease off the pedals.

Refined 12-Speed Gear Progression

The 12-speed layout gives riders closer gear steps and better cadence control compared with older wide-range 11-speed setups, which is especially useful for maintaining rhythm during fast road riding, racing and rolling terrain.

Existing Freehub Compatibility

A major practical advantage of the CS-R8101 is compatibility with Shimano’s existing road 11-speed Hyperglide freehub bodies, making it easier for riders to upgrade to Shimano 12-speed without replacing compatible wheels.

Ultegra-Level Durability and Value

Ultegra components are widely regarded as the performance sweet spot in Shimano’s road range, offering near-flagship function with better value and service practicality than Dura-Ace.

Efficient Power Transfer

The cassette’s tooth profiling is designed to work as part of Shimano’s 12-speed drivetrain system, interacting precisely with the chain and rear derailleur for quieter running, smoother gear engagement and efficient power transfer.

Size, Fit, Geometry & Measurements

Available Cassette Sizes

11-30T

  • Recommended for riders who prioritise tight gear spacing
  • Strong choice for criteriums, flat roads, fast bunch rides and race-focused setups
  • Ideal with 52/36T or 54/40T chainrings for strong riders

11-34T

  • Recommended for riders who want easier climbing gears
  • Strong choice for endurance riding, hilly terrain and long-distance events
  • Ideal with 50/34T or 52/36T chainrings for versatile Australian road riding
Who it is best suited for and How it performs in local conductions

Best Suited For

  • Road cyclists upgrading to Shimano 12-speed
  • Ultegra Di2 riders replacing a worn cassette
  • Endurance riders wanting smoother climbing gears
  • Club racers and fast bunch ride cyclists
Industry Feedback, Rider Reviews and our own opinion

Cyclists Hub’s updated April 2026 review of Shimano Ultegra R8100 praised the platform for excellent shifting, braking performance, long battery life and reliability after more than 5,000km of riding, while also noting its strong value compared with Dura-Ace.

While these reviews focus on the full Ultegra R8100 system, the cassette is central to that performance because Shimano’s 12-speed shift quality depends on precise interaction between the cassette, chain, rear derailleur and chainrings.

Rider Feedback & Community Sentiment

Rider feedback around Shimano Ultegra 12-speed cassettes is generally very positive, especially among cyclists replacing worn 11-speed setups or moving into Shimano 12-speed Di2.

Common positive comments include:

  • Smooth shifting across the cassette
  • Reliable performance under load
  • Quiet drivetrain feel when paired with a fresh Shimano chain
  • Excellent climbing range with the 11-34T option
  • Good value compared with Dura-Ace
  • Easy upgrade path due to 11-speed road freehub compatibility
  • Strong availability through Australian bike shops

Many riders consider the Ultegra cassette the smart choice because it delivers premium Shimano shift quality while keeping replacement costs more realistic than Dura-Ace.

Why We Love It at Pedal Passion

We love the Shimano Ultegra CS-R8101 because it gives riders the shift quality they expect from Shimano without the premium price of Dura-Ace. 

Product Care & Warranty Info

Cyclists Hub’s updated April 2026 review of Shimano Ultegra R8100 praised the platform for excellent shifting, braking performance, long battery life and reliability after more than 5,000km of riding, while also noting its strong value compared with Dura-Ace.

While these reviews focus on the full Ultegra R8100 system, the cassette is central to that performance because Shimano’s 12-speed shift quality depends on precise interaction between the cassette, chain, rear derailleur and chainrings.

Rider Feedback & Community Sentiment

Rider feedback around Shimano Ultegra 12-speed cassettes is generally very positive, especially among cyclists replacing worn 11-speed setups or moving into Shimano 12-speed Di2.

Common positive comments include:

  • Smooth shifting across the cassette
  • Reliable performance under load
  • Quiet drivetrain feel when paired with a fresh Shimano chain
  • Excellent climbing range with the 11-34T option
  • Good value compared with Dura-Ace
  • Easy upgrade path due to 11-speed road freehub compatibility
  • Strong availability through Australian bike shops

Many riders consider the Ultegra cassette the smart choice because it delivers premium Shimano shift quality while keeping replacement costs more realistic than Dura-Ace.

Why We Love It at Pedal Passion

We love the Shimano Ultegra CS-R8101 because it gives riders the shift quality they expect from Shimano without the premium price of Dura-Ace.