The SRAM Rival Power Meter E1 crankset is SRAM's most advanced aluminum crankset, now equipped with a highly accessible power meter. 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. Power measurement in the spindle measures power on the left side and calculates the total wattage. Long battery life (over 400 hours) - enough for a full cycling season. User-replaceable AAA lithium battery. DUB bottom bracket for extra durability and easy installation. Waterproof (IPX7 - up to 1 meter deep for 30 minutes). Lightweight (less than 40 grams heavier than a standard crankset). Enables sharp and accurate shifting. Integrated one-piece chainrings for optimal stiffness and performance. SRAM Article number: 737912 EAN code: 710845916229 Supplier number: 00.6118.745.007 Retail packaging: Yes