The SRAM Rival Power Meter E1 crankset is SRAM's most advanced aluminum crankset, now equipped with a very accessible power measurement. It provides accurate data integrated into a light, stiff, and strong crankset, featuring the advanced X-Range shifting system. This ensures a wide range, smaller steps between gears, and a more efficient gear ratio.Spindle-based power meter measures left-side power to calculate total wattageLong battery life (over 400 hours) - enough for a full cycling seasonUser-replaceable AAA lithium batteryDUB bottom bracket for added durability and easy installationWaterproof (IPX7 - up to 1 meter deep for 30 minutes)Lightweight (less than 40 grams heavier than a standard crankset)Enables crisp and accurate shiftingIntegrated one-piece chainrings for optimal stiffness and performanceSram Article number: 737916 EAN code: 710845916281 Supplier number: 00.6118.745.015 Retail packaging: Yes