X-Dome one-piece steel construction increases stiffness and reduces weight for race-level performance
AXS electronic shift ramps ensure fast, clean gear changes even under high torque loads
Wide gear progression options from 10-28T to 10-36T adapt to both racing and endurance builds
Flattop chain compatibility with SRAM Flattop D1/E1 chains for quiet, low-wear operation
10T start cog expands gear range without requiring larger chainrings, maintaining high speed efficiency
Summarized by Shop
The SRAM RED E1 Cassette is SRAM’s lightest and most refined road cassette, engineered for ultra-fast, precise shifting and maximum drivetrain efficiency. Designed for RED AXS E1 systems, it delivers a premium balance of wide-range gearing, tight cadence steps, and race-level durability.
Key Features & Benefits
X-Range Wide Gear Prog