SRAM overhauled the chainring interface when they moved to the Red AXS platform, and the E1 2x Chainring Kit is the replacement set for the current-generation Red AXS crankset. It's a one-piece 2x chainring — the inner and outer rings are machined as a single unit rather than separate rings bolted together — which is where the stiffness and weight savings come from. If your Red AXS E1 crank has worn rings, or you want to change gearing without buying a new crankset, this is the part.

SRAM offers three ratios in the kit: 46/33T, 48/35T, and 50/37T. Every option holds a 13-tooth delta between rings, which keeps the cadence jump manageable when you shift from small to big ring. Pair that with a 10-33T or 10-36T cassette on the back and you get the wide range that X-Range gearing is built around — one-tooth jumps at the top of the cassette where you're cruising, and enough low-end for climbing without the traditional compact/mid-compact trade-off.

The 8-bolt direct mount interface is the key compatibility detail here. This kit fits SRAM's 8-bolt cranks — Red E1, Red D1, and Force AXS cranksets with the 8-bolt spider. It does not fit older 3-bolt or 22-style cranks, and the tooth profile is cut for the SRAM Flattop chain used across the AXS 12-speed road ecosystem, so these won't mesh cleanly with a non-AXS 12-speed drivetrain.... Read More