SRAM Red Black BB30 Double Chainset 2011: The Black RED groupset adds an elegant black finish (rear derailleur, front derailleur, & brakes), while the modern silver graphics are maintained. This new colour option matches perfectly with all the framesets on the market. Strong, smooth, responsive: the SRAM RED Crankset is the perfect choice. The integrated carbon spiders design is sleek & incredibly stiff, allowing for efficient power transfer. The integrated carbon-spider construction is light & stiff for greater power transfer with less effort SRAM Red Power Glide chainrings are designed to professional-grade shift, stiffness, & durability standards Arm
Material: Carbon Chainring
Material: AL 7075-T6 Aluminum, alloy chainring bolts Weight: 630g with BB (BB30) Available Arm Lengths: 165mm, 170mm, 172.5mm, 175mm Available Ratios: BB30 53/39, 52/36, 50/34