Sram Red Black 10 Chainset; The stiff, smooth, and strong SRAM Red Crankset is poised to dominate. The integrated carbon spider's design is sleek and extremely stiff, allowing for instant, efficient power transfer. Matched to the SRAM Red crankset is an equally revolutionary pair of chainrings. Optimized exclusively for SRAM Red components, they're stiffer than anything ever before. - The integrated carbon-spider construction is light and stiff for greater power transfer with less effort - SRAM Red PowerGlide chainrings are designed to professional-grade shift, stiffness, and durability standards - Arm Material: Carbon - Chainring Material: AL 7075-T6 Aluminum, Alloy Chainring Bolts - Weight: 760g with BB - Please note: supplied WITHOUT bottom bracket EX DISPLAY stock so shows some signs of use and does not include any fitting instructions.