Oval retainer ring for from hope designed to be used with hope spiderless cranks the spiderless design saves weight compared to a crank with spider the oval is compatible with 1 x drivetrains and use 12 percent with ovality 113 degrees clocking the oval shape eliminates the dead zone in the pedal stroke for better efficiency and retains the chain without the need for chain device available in black in 28 30 32 34 teeth