Made from 7000 series lightweight alloy, the Miche Advanced Track Chainrings feature an aerodynamic profile for better performance and higher stiffness. The chainrings are CNC machined and feature anodised / laser branding. Weight: 74g. BCD: 144mm. Compatibility: Pista 1/8". Material: AL 7075-T6 Total Treatment anodized. Available in sizes 46T, 47T, 48T, 49T, 50T, 51T, 52T, 53T, 54T, 55T, 56T, 57T, 58T, all with 144 BCD. Color: BLACK.