The SRAM Red This lightweight, durable cassette offers shifting ramps specifically designed for electronic shifting. Carefully chosen tooth breaks keep you in the right gear, even on steep climbs or sprints.
Features
Designed for smooth and fast gear changes
Gradual progression of speeds between gears
10-tooth start for a wider speed range
Compatible with XDR freehub bodies
X-DOME one-piece machined steel design for weight savings
Available in 10-28 teeth, 10-30 teeth, 10-33 teeth and 10-36 teeth