Both the carbon rim and carbon hub are lighter than previous generations of Dura-Ace

A PU-laminated toecap and side reinforcements add further protection and durability

The unique properties efficiently breakdown grease and allow for simple cleansing of bottom brackets

CFD-based fabric placement and seam construction

durability

SRAM Red XG-1290 12 Speed Cassette Size:10-33T Both the carbon rim andThe 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.