The SRAM RED AXS Power Meter spider transforms your RED or Force eTap AXS crank into an elite performance component. With integrated, ±1.5% accurate Quarq technology built into the chainring spider, it delivers consistent dual-leg power readings—completely unaffected by temperature or weather. Crafted with carbon crank arms, the kit is 29 g lighter than its predecessor. Featuring X‑Range gearing and a 13‑tooth difference, it offers smoother shifts and a wider gear range ideal for racers and serious endurance riders. Available in 46/33T, 48/35T, and 50/37T sizes, and crank arm lengths from 160 mm to 175 mm, compatibility is broad and precise.
FEATURES
Integrated Quarq Power Meter – Full-power accuracy housed within the spider, for lightweight stiffness and exact readings ±1.5%
Dual-Leg Measurement – Captures power balance between left and right legs for optimized training insights
Carbon Crank Arms – Lighter and more responsive, saving 29 g over the previous generation
X‑Range Gearing Tech – 13T tooth jump ensures efficient cadence transitions and broad gear coverage
DUB Bottom Bracket Compatibility – Fits all SRAM Road DUB BBs for simple, clean installation
ANT+ & Bluetooth Connectivity – Seamless integration with bike computers and smartphones for training apps
Variable Chainring Options – Choose from 46/33T, 48/35T, or 50/37T combinations to suit riding styles
Crank Arm Lengths – Available in 160/165/167.5/170/172.5/175 mm to suit fit preferences
SPECIFICATIONS
Model: FC‑RED‑P‑E1
Speed Rating: 12-speed
Power Type: Spider-based dual-leg
Accuracy: ±1.5% across temps
Chainring Sizes: 46/33T, 48/35T, 50/37T
Crank Arm Lengths: 160–175 mm
Bottom Bracket Interface: SRAM Road DUB
Crank Arm Material: Carbon
Weight: 580 g (172.5 mm with 48/35T rings & battery)
Chainline: 45 mm
Spindle Diameter: 28.99 mm (DUB)
