Uses SRAM 3-bolt direct mount chainring to crank interface Provides a lighter set up by elimating the use of a spider while remaining strong and stiff CNC Machined from high grade 6061-T6 series aluminum for high strength while providing weight savings Designed for use with Promax HF-3 and CK-1 cranksets, but will also fit other cranks that utilize SRAM 3-Bolt mount chainrings
