Choosing the right chainrings for your SRAM crankset or Quarq power meter can be tricky.  Feel free to contact us if you have any compatibility questions.  Chainrings are designed for a single, double, or triple chainring cranksets and have a wide variety of gearing choices based on the number of teeth on the chainring.  Generally a front chainring that has fewer teeth will be easier to pedal, whereas a larger chainring will require more power.