Shimano Dura-Ace CS-R9100 Cassette

$335⁰⁰

RA price match promise
Pay later with , and

The Shimano Dura-Ace CS-R9100 Cassette typically ships in 5-8 business days

Shimano | SKU: ICSR910011125 | Option: 11x25, No Color

Pickup available at RA Cycles - Brooklyn

Usually ready in 24 hours

Questions about this product?

* Product image may vary. Refer to the description for accurate details.

Shimano Dura-Ace CS-R9100 Cassette Info

The Shimano Dura-Ace CS-R9100 Cassette sits at the top of Shimano's 11-speed road hierarchy — and the construction reflects that. The five largest cogs ride on dual multi-material carriers combining aluminum and carbon fiber, while the two smallest cogs are titanium for weight savings where it counts most. The remaining six cogs are steel, keeping durability where the drivetrain stress is highest.

Shimano also revised the tooth profile geometry on the R9100 to improve shift speed and smoothness across the range. The cassette is available in five ratios — including the wider 11-30 option for riders who want more range without stepping down a groupset tier, and two 12-tooth small-cog options for those who don't need an 11t regardless of the terrain. Each ratio has a verified weight: 175g (11-25), 193g (11-28), 211g (11-30), 189g (12-25), and 205g (12-28).

Shimano Dura-Ace CS-R9100 Cassette Specs at a Glance

Speeds: 11-speed
Available ratios: 11-25, 11-28, 11-30, 12-25, 12-28
Cog materials: Titanium (smallest 2), steel (middle 6), aluminum/carbon carrier (largest 5)
Weights: 175g / 193g / 211g / 189g / 205g (by ratio)
Compatibility: Any 11-speed chain and rear derailleur; designed to pair with Shimano 11-speed road components