Sram Red eTap AXS is much more than a simple evolution of its predecessor, it is a revolution, a fully integrated approach to design a groupset that empowers ever more capable riders and the diverse range of bikes that they choose to ride. The carbon tuned Sram Red cranks utilize proprietary Sram carbon lay-up design to increase thickness and stiffness at critical stress areas. Advanced carbon architecture techniques such as tapering, and terracing provide significant weight savings without compromising on strength. The cranks smoothly integrate with a one-piece aluminum chainring design that also ensures the perfect balance of weight & stiffness. The recent development of the 10 tooth smallest cassette sprocket alongside 12-speed cassettes has allowed Sram to re-think gear ratios to offer more range and a smoother gear progression. This new high gear cassette sprocket with a smaller tooth count allowed Sram to pioneer correspondingly smaller chainring sizes with lower gearing whilst still exceeding the gearing range of a traditional single chainring 11-speed drivetrain. As the chainring can be smaller in size it is consequently lighter and more aerodynamic than the 11-speed chainring that would be necessary for an equivalent gear ratio. This chainset features a simple four bolt mount system that makes it easy to swap chainrings to optimize the drivetrain for certain applications, the Red cranks are compatible with a wide variety of single and double chainrings.