FSA has unleashed the fattest and stiffest chainring available for a track crankset. 144mm bolt pattern adds stiffness and works with any standard track crankset. Convex profiling adds to the stiffness and aero advatage. The black anodizing has a great look and overall this chainring is a good alternative for folks who do not want to spend the money on the rounder Sugino Zen or Dura-Ace chainring. Non-profiled teeth fit 1/8" chains only.