Shimano Ultegra CS-R8101 Cassette 12-speed

The Shimano Ultegra CS-R8101 is the go-to 12-speed road cassette for riders who want top-level shifting performance at a competitive price. Equipped with Hyperglide+ technology, this cassette delivers faster, smoother, and quieter shifting — even under heavy load. Perfect for training, racing, and performance-focused riding.

Fast & smooth shifting

Thanks to Hyperglide+, the chain glides effortlessly across the cogs, providing up to 33% faster shifts compared to Shimano’s previous 11-speed generation. Even during steep climbs or hard sprints, shifting remains precise and reliable.

Smart gear progression

Shimano has optimized the “sweet spot” (6th, 7th, and 8th cogs), giving you the most used gears at comfortable cadence ranges. This means smooth transitions and less disruption to your rhythm at typical riding speeds.

Pro-level performance at a smart price

The Ultegra R8100 cassette offers nearly the same shifting quality as Dura-Ace, but at a more accessible price. It’s slightly heavier and a bit less durable, making it a perfect choice for riders who value high performance without paying top-tier prices.

Key Features

• Hyperglide+ technology – faster, smoother shifts, even under load

• Optimized “sweet spot” cogs – seamless cadence at common speeds

• Compatible with HG 11-speed freehub bodies – easy installation

• Lightweight and efficient – pro-level performance for less

• Available in 11-30T and 11-34T options

Specifications

Pros & Cons

Pros

• Extremely fast and precise shifting

• Reliable performance under heavy load

• Smart gear spacing for smooth cadence

• Fits existing Shimano HG freehub bodies

Cons

• Slightly heavier and less durable than Dura-Ace

Compatibility

• 11-30T: 11-12-13-14-15-16-17-19-21-24-27-30

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

Compatible with Shimano 11-speed Road freehub bodies – easy to install without extra adapters.

Why order from Cyclexclusive

• 100% genuine Shimano products

• Competitive pricing – often below retail MSRP

• Orders placed before 15:00 ship the same day

• Shipping costs depend on destination country

• Easy returns