Product Description Perfect for Triathlon and Time Trials: the Red 1 AXS Aero power meter crankset by QUARQ The QUARQ Red 1 AXS Aero power meter crankset meets the needs of triathletes and time trial riders with its simplicity, strength and durability. Thanks to Direct Mount Aero chainrings with integrated power measurement, the aerodynamics of the crank have been improved, while the narrower gear ratio is perfect for racing and flatter terrain. In some disciplines, 1x drivetrains are simply unbeatable. Information regarding the return of batteries and electrical equipment:Information on the return and disposal of used batteries and electrical equipment can be found here. Specifications:Application:Triathlon & Time Trial, RoadType:power meter crankset (dual-sided)Compatibility:1x12-speedChainring Mount:SRAM Direct MountTechnical Information:Series:SRAM Red AXSCrank Arm Material:CarbonChainring Material:aluminiumGradation:48 tooth, 50 toothCrank Arm Length:170.0 mm, 172.5 mm, 175.0 mmChainline:45 mmAxle Diameter:28.99 mmRecommended Bottom Bracket:SRAM Road DUBTolerance:+/- 1.5%Point of Measurement:chainringPower Source:CR2032 lithium batteryData Collected:power (dual-sided), cadence, torque, pedal stroke uniformityWaterproof:IPX7Data Transfer:ANT+, BluetoothFeatures:1x drivetrain for simplified functionalityfully integrated power measurement in Direct Mount Aero chainringchainrings easily exchangeable without recalibrationperformance measurement is not affected by temperature fluctuationsseparate power measurements for the left and right legSRAM X-Sync™ Wide-Narrow chainring technology for maximum chain controldurable laser finish of the chainringdurable and simple DUB bottom bracket standardnon-aero chainrings can be mounted with a single toolTechnology:QUARQ Operating Principle The crankset forms the heart of your bike. Their only task is to convert the force of both legs into forward motion - the perfect place to measure performance. Power meters calculate power by measuring torque (pedal force) and angular velocity (cadence). Power = torque x cadence. When you pedal, all parts of the bicycle drivetrain shift (bend) slightly under the load. Power meters are designed using FE analysis so that these displacements take place in a very controlled manner and at specific locations in relation to the applied load. Strain gauges are used to measure this displacement and thus calculate the applied torque. Reed switches are used to calculate the cadence. DZero DZero is QUARQ's next generation power meter, named after the DZero Experiment, one of the most accurate and innovative scientific projects to discover subatomic particles. With a revised measurement loop, an optimised strain gauge design, increased accuracy and modern software, DZero represents the " state of the art" for power meter technology. You can choose between Bluetooth LE and ANT+ technology for data transfer. AXS AXS is SRAM's electronic integration platform that combines electronic bicycle components and software. The SRAM AXS app allows you to view battery status, change component behaviour, adjust controls, receive maintenance reminders and update firmware. X-Sync™: X-Sync 1x chainrings by SRAM provide the highest performance and durability. The long SRAM X-Sync tooth edges grip the chain earlier than traditional triangular teeth. The sharp and narrow tooth profile and the rounded bevelled edges support the chain guide. To provide the best possible performance on muddy terrain, the X-Sync chainrings have recesses for removing dirt and mud for the inner chain links and rollers. Manufacturer Numbers:170.0 mm 48 tooth:00.3018.210,170172.5 mm 48 tooth:00.3018.210,172175.0 mm 48 tooth:00.3018.210,175170.0 mm 50 tooth:00.3018.209,170172.5 mm 50 tooth:00.3018.209,172175.0 mm 50 tooth:00.3018.209,175Contents:1 x QUARQ Red 1 AXS Aero power meter crankset (48 tooth or 50-tooth)1 x battery Manufacturer: SRAM LLC 1000 W. Fulton Market 4th Floor Chicago IL 60607 USA info@sram.com Distributor: SRAM Europe Sales and Services B.V. Paasbosweg 16 3862 ZS Nijkerk Netherlands info@sram.com