SRAM's Red XPLR X-Sync Thread Mount E1 chainring is the replacement ring for anyone running the Red XPLR AXS 1x power meter crank and either wanting a different tooth count or needing to swap a worn ring. The Thread Mount interface is what makes this system different from a traditional bolt-circle chainring — the ring threads directly into the power meter spider rather than bolting on through a standard BCD pattern. That direct connection cuts weight and improves stiffness, but it also means you can't run this ring on anything other than the Red XPLR AXS power meter spider.

Tooth count options run 38T, 40T, 42T, 44T, and 46T, which covers the range most gravel riders end up settling into for 1x setups paired with a 10-46T or 10-44T XPLR cassette. Smaller rings favor climbing-heavy terrain and loose surfaces where you're grinding out low gears more often than spinning out; larger rings shift the range toward pavement and faster mixed-surface days. Because ring swaps are supported by the system, dialing in your gearing after a few rides is straightforward — provided you have the SRAM Thread Mount Chainring Removal Tool, which is sold separately and required for installation.

Compatibility is where you need to pay attention. This ring works with SRAM road Flattop chains across 12- and 13-speed drivetrains, which covers Red XPLR AXS and Red AXS road setups. It is not compatible with SRAM T-Type chains from the Eagle Transmission ecosystem, so if you're building or servicing a mountain or T-Type gravel drivetrain, this is not the ring for that job.... Read More