Chainring bolt circles changed when SRAM introduced their road AXS groupsets. The Red AXS E1 2x Chainring Kit uses a direct mount interface on the inner ring and a 107mm BCD for the outer ring, which differs from the older 110mm BCD standard. If you're replacing worn rings on a Red AXS crankset or switching gear ratios, this kit includes both chainrings and the bolts to mount them.

The outer ring bolts directly to the spider arms using the 107mm bolt pattern, while the inner ring uses SRAM's direct mount interface that attaches to the back of the spider. This two-piece design allows you to replace rings individually down the road, though they're sold together here as a matched set. The tooth profiles are cut for SRAM's Flattop chain, which has a different roller spacing than traditional chains, so these rings won't play nicely with non-AXS 12-speed setups.

Available in 46/33T and 48/35T configurations, covering the two most common gearing choices for road racing and fast group rides. The 46/33T option gives you a slightly easier climbing gear while keeping tight spacing between shifts. The 48/35T delivers the classic big ring for flat roads and descents. Both configurations use the same 107mm BCD outer ring mounting, so your crankset compatibility stays consistent regardless of which ratio you choose.... Read More