Stiffer X-Glide R™ chainrings feature thicker construction, advanced shift timing pins and ramps, which are optimised for shifting with the Yaw™ Front Derailleurs.
Upgrade an older SRAM RED groupset with the power and precision of new SRAM RED 2012 with these chainrings and the new SRAM RED Yaw™ Front Derailleur.
Big chainrings are available in both HB (hidden bolt) or Non HB (non hidden bolt). Current 2012 new model SRAM RED requires HB, while older 2011 and previous require Non HB chainrings.