Amazon.com : SRAM 42T 130mm Black Chainring use w/ Traditional or 10 or 11 Speed Yaw 54 or 55 Outer Ring : Bike Chainrings And Accessories : Sports & Outdoors
SRAM CX1 X-Sync Chain Ring - Epicenter Cycling
SRAM Force 1 Carbon BB30 42T Crankset at WesternBikeworks