New SRAM Apex 1 X-Sync Asymmetry 10/11 Speed Chainring 42T BCD 110mm Black | eBay
Sram PG1130 11-42t Cassette | Hi Power Cycles
Wolf Tooth Direct Mount Chainring - 42t, SRAM Direct Mount, Drop-Stop - Pro Bike Supply
Elliptical Direct Mount Chainrings for SRAM Cranks – Wolf Tooth Components
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