Sram:

OVERVIEW
The workhorse of X-Range gearing. The SRAM RED XG-1290 cassette progresses fluidly and quickly through a wider range of gears. It’s specifically designed for wireless electronic shifting and the one-piece design offers you the best in weight savings.

FEATURES

• Designed for smooth and fast shifting
• Gradual gear progression between cogsat least five one-tooth jumpswhile 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
• All Zipp wheels starting from 2012 are XDR ready

SPECIFICATIONS

Speed (CS)12s
Gearing10-26t, 10-28t, 10-33t
Cog finish (Cassette)Rainbow, Silver
Technology (Cassette)XG
Cog sizes10-26t;10,11,12,13,14,15,16,17,19,21,23,26 / 10-28t;10,11,12,13,14,15,16,17,19,21,24,28 / 10-33t;10,11,12,13,14,15,17,19,21,24,28,33