Wolf Tooth Components Aero Chainring 8-Bolt Drop-Stop B 50T BlkTaking advantage of 1x drivetrain systems and wider range rear cassettes, Aero chainrings provide similar overall range to standard 2x drivetrain configurations while helping to optimize each detail in pursuit of speed Aero direct mount chainrings for SRAM 8 Bolt cranks replace your existing spider and chainring with one clean looking, lightweight, and stiff piece of machined billet, optimized for SRAM Eagle and Flattop chains Chainline is 45mm on