Our Premium 1X Cyclocross 110/4bcd oval chainrings from AbsoluteBLACK are designed specifically for APEX 1 cranks that feature the asymmetric 110/4bcd bolt pattern. Please note that these chainrings are not compatible with other cranks. They feature a narrow-wide design that ensures optimal chain retention. These chainrings are compatible with 9, 10, 11, and 12-speed Eagle drivetrains. You can use the original Sram bolts for installation. The chainrings are available in three sizes: 38T, 40T, and 42T. The weights for each size are as follows: 38T (61g), 40T (65.5g), and 42T (71g). Please ensure that you have Sram APEX 1 cranks with the asymmetric 110/4bcd bolt pattern before purchasing these chainrings. You will also need to use the original Sram mounting bolts. The chainrings are made from CNC machined 7075 Txxx Aluminum for durability and longevity. They are designed to withstand mud and other challenging conditions often encountered in cyclocross racing. These chainrings have a fitment of 110/4. Get the most out of your APEX 1 cranks with our Oval Sram APEX 1 traction chainring from AbsoluteBLACK.