Created specifically for our latest innovation, the RED XPLR AXS power meter, these replacement rings are crafted for compatibility with Thread Mount spider design. Our unique mounting system prioritizes weight reduction, stiffness and precision, while still giving you the flexibility to adjust ring sizes. With five size options available, customize your ride to fit your preferences. KEY FEATURES Thread Mount design is light, stiff, and accurate Available in 38T, 40T, 42T, 44T, and 46T Compatible with all road Flattop chains SRAM Thread Mount Chainring Removal Tool required for installation SPECIFICATIONS Chainring Size 38T, 40T, 42T, 44T, 46T Bolt Circle Diameter (BCD) Thread Mount Speeds 12, 13 Compat - Yaw n/a Material (Chainring) Aluminum Color (Chainring) Black/Silver