For 12-speed, Aluminium, black / silver Direct mount, without power meter, Set Number of teeth 37, 50 Item type Direct Mount Group affiliation SRAM Main color black Secondary color silver Rear gear stages 12-speed Front gear stages 2-speed The RED AXS is SRAM's lightest, stiffest, and most durable chainring. The one-piece construction ensures that no effort is lost. The 13-tooth difference between the chainrings provides precise shifting in every setting, as well as a smaller cadence jump when shifting up. Thanks to refined technology, durability is greater than ever before. Light, stiff, and durable chainring for crisp and precise shifting. One-piece construction for faster, smoother, and more secure shifting. X-Range gearing technology offers more range and a smoother shifting progression. Sram Article number: Retail packaging: Yes