RED XG-1290 E1 Cassette

 SRAM's new Red XG-1290 cassette, designed for smooth and fast shifting

• Gradual gear progression between cogs — at least five one-tooth jumps on 10-28T, 10-30T and 10-33T cassettes — while still offering a wider range
• 10-tooth start helps provide a wider gearing range
• Designed to work with an XDR driver body
• One-piece machined steel X-DOME design for weight savings
• SRAM Model ID: CS-XG-1290-E1