Integration is the whole point here. The Red AXS E1 Aero Power Meter Kit from SRAM machines the power measurement hardware and the aero chainring into one direct-mount piece, so nothing stacks between the crankarm and the teeth — no separate spider, no additional interface to flex when you load it up. Power lands within +/-1.5% and holds that accuracy as conditions change through a ride, which matters when you are pacing off numbers rather than feel over a long TT or an Ironman bike leg.

The ring itself is machined aluminum with a 1x-specific aero profile and a 6.5mm offset, mounting to SRAM's 8-bolt direct mount interface. Tooth shaping uses X-SYNC narrow-wide spacing to hold the chain without a front derailleur or a clutch, and the laser-etched finish keeps the graphics from wearing off the ring face. Chain compatibility is SRAM AXS 12-speed, and the kit is specified for both Road and Road Wide crank platforms.

Before ordering, check what crankarms you have. This kit bolts only to SRAM's 8-bolt direct mount Red and Force eTap AXS cranks — it is not a fit for the older 107mm BCD spider-mount cranksets, and there is no adapter path. It also commits you to 1x. Because the measurement hardware and the teeth are one piece, a worn ring means replacing the power meter along with it, so factor that into the math.... Read More