This versatile road bike chainset is equipped with carbon fibre crank arms, which offer fantastic strength without any weight penalty. As a result, you'll benefit from this model's powerful torque when climbing & when it's time to descending you won't have to worry about any excess drivetrain weight slowing you down. SRAM has also kitted out this CX (cyclocross) race-ready model with stiff aluminium X-Glide R chainrings, which offer reliable shifting & power transfer. Coming complete with graphics that match SRAM Red e Tap electronic components, this is a great choice of upgrade for riders who want a dependable chainset for training & competing. Carbon Fibre XC Chainset Already a legend in its time, the SRAM RED crankset features a completely hollow construction all the way to the spider. Its hidden bolt pattern makes better use of carbon fibre to further improve stiffness & shed weight. Its carefully shaped Exogram hollow carbon fibre arms produce a high stiffness-to-weight ratio & its sturdy chainrings are optimised for the Yaw front derailleur. Technologies: Exogram Technology: Uses a large, hollow cross-section all the way to the spider, minimizing weight while maximizing stiffness. Hidden Bolt Pattern: Leverages the characteristics of carbon fiber while presenting a sleek appearance. X-Glide R Chainrings: Feature thicker construction & advanced shift timing pins & ramps, which are optimized for shifting with the Yaw™ front derailleur. Compatibility: Compatible with SRAM RED e Tap components. Manufacturer's Part Numbers: 00.6118.389.003 Black 46/36T Yaw 172.5mm 00.6118.389.004 Black 46/36T Yaw 175mm