SRAM RED AXS Flattop XG‑1290 12‑Speed Cassette

Wide range and tight jumps? Why not both? Our lightest, most durable cassette breaks new ground for gearing choices as well. Four distinct cassette options, including our first 10-30T and 10-36T RED cassettes, each provide secure shift ramps specifically designed for electronic shifting, whether racing road on a 10-28T or creating an all-road setup with a 10-36T. Carefully chosen tooth jumps keep you in the right gear when you’re out of the saddle on steep climbs and making fine changes to hold a wheel while approaching a sprint. The SRAM RED XG‑1290 is the lightest and most advanced 12-speed road cassette designed for AXS systems. It features a one-piece steel X‑DOME structure, gradual gear progression, and refined tooth profiles for lightning-fast, precise shifting and an ultra-narrow build.

FEATURES

Flattop Flattop X‑Range Design – Enables narrower chain and drivetrain efficiency

X‑DOME One‑Piece Construction – Machined from steel to reduce weight and preserve durability

Gradual Gear Progression – At least five one‑tooth jumps for smooth transitions in 10–28, 10–30, and 10–33 variants

Wide Range Options – Available in four sizes: 10–28T, 10–30T, 10–33T, and 10–36T

XDR Driver Compatibility – Specifically engineered for XDR road driver bodies

SPECIFICATIONS

Model: CS‑XG‑1290‑E1

Speed: 12‑speed

Gear Range Options: 10–28T, 10–30T, 10–33T, 10–36T

Cog Construction: One-piece X‑DOME steel

Chain Technology: Road Flattop (E1)

Driver Body: XDR

Weight: Approx. 180 g (10–28T version)

Compatibility: SRAM RED AXS 12-speed road drivetrains