Reach new goals and explore new roads with a power meter that delivers on accuracy, durability, and reliability. The Quarq DFour DUB Power Meter is paired with the Quarq DUB Crankarms to pair with your Dura-Ace R9100 or Ultegra R8000 chainrings. A SRAM DUB Bottom Bracket will be required for installation.Key Features:Bluetooth low energy technology and ANT+ wireless data transfer,MagicZero - automatically checks and recalibrates your power meter as you ride – no need to manually calibrate,AxCad -- no cadence magnet required,10K Temperature CompensationBattery -- CR2032, 200-hour battery life, change without tools,OmniCal -- swap chainrings without affecting accuracy,IPX7 waterproof rating,Accuracy -- within 1.5%, measuring both legs.,.Specifications:Speeds: 11,Crank arm length: 170mm,BB Compatibility: All SRAM Road DUB BBs,Chainring Size: n/a,Bolt Circle Diameter (BCD): 110 BCD,Chainline: n/a,BB Spindle Interface: DUB,Chainring material: n/a,Guard: No Guard,Crank arm material: Carbon,Color (Crank arm): Natural carbon,Power Meter Type: Spider.
Engineered for extreme accuracy on your training sessions, these power meter pedals feature a power sensor on both the left and right pedals. Designed with breakthrough technology, this version's power meter uses IAV Cycling Dynamics and is mounted directly on both pedals for real balance data and not estimates. By using the integrated gyroscope, this model also provides advanced pedal metrics for an incredibly detailed analysis of your pedalling for each leg. Coming complete with both Bluetooth and ANT+ connectivity, as well as up to 50 hours battery life, this is a great choice of upgrade for riders who want to improve their performance. IAV Power System Many power meters calculate power using the Average Angular Velocity (AVG) per rotation, instead of the instantaneous Angular Velocity (REAL) value: this may introduce an additional error, up to 4.5% compared to the declared accuracy. Assioma, thanks to its exclusive IAV Power system and an integrated gyroscope, measures the actual instantaneous angular velocity to guarantee the same ±1% degree of accuracy with any style of pedalling, even with oval chainrings. Automatic Temperature Compensation Rain, snow, mud, or sweltering heat: Automatic Temperature Compensation (ATC) ensures exact, consistent watt measurements in any weather condition at temperatures between -10°C and 60°C. Waterproof, Resistant and the Lightest Ever Made The lightest and most compact pedal-based power meter made by Favero: with no protruding elements, it does not interfere with the pedalling. Not even when cornering. Protected by a bi-component resin block, the power meter sensor is extremely resistant to shocks and fully waterproof. Item Top Features Continued: Accuracy Power Measurement: ± 1% Temperature Compensation: -10°C / +60°C Water Resistance Degree: IP67 Q-Factor: 54mm Compatible Cleats: Original LOOK Kéo and Favero cleats (red and black) Bike Type: Racing, Road Made in Italy Warranty: 2 years Total Weight Per Pedal: 151.5g (battery included) In The Box: • Left pedal with power sensor • Right pedal with power sensor • Battery charger including plugs (EU, US, UK, AU) • 2 two-meter long micro-USB/USB cables with 2 magnetic connectors • 2 red cleats float 6° (LOOK Kéo compatible) • Hex key and 4 washers for the installation • User manual Technologies: Easy to Install: Install and transfer your Assioma from one bike to another just like normal pedals, easily and without extra tools. Just screw them on your bike crank arms and you are ready to pedal! IAV Cycling Dynamics: Assioma supports the advanced metrics IAV Cycling Dynamics: IAV Power Phase and IAV Rider Position. These metrics, combined with the classic power data, allow analyzing in details the pedaling technique and how the cyclist's position on the bike influences performances. IAV Power and Gyroscope: Unlike others, the measurements of Assioma are not affected by errors related to very irregular pedaling (eg. sprint uphill) or the use of oval chainrings. This is because Assioma is able to detect the actual instantaneous angular velocity of the pedal stroke, thus giving you the degree of accuracy of ±1% in any situation. Not only in the laboratory. Bluetooth and ANT+ SMART: Assioma communicates via Bluetooth and ANT+ with bike computers and smartphones, both Android and iOS. Real Dual-Sided Power Data: Assioma DUO provides dual-sided data through real measurements: taken individually on both the left and the right leg; this make it possible to observe with accuracy not only the Total Power, but also the L/R Balance, the Torque Effectiveness (TE), the Pedal Smoothness (PS), etc. Accuracy and Consistency: Assioma provides accurate watt measurements with a great consistency and stability in the actual on-road use conditions and at any temperature between -10°C and 60°C. Thanks to the ATC (Automatic Temperature Compensation) too. Waterproof, resistant and light: Assioma is the lightest pedal-based power meter ever made. Thanks to its compact design, it never interferes with the pedaling. Not even when cornering. The power sensors are protected in a bi-component resin block, extremely resistant to shocks and completely waterproof. Rechargeable and Green: Assioma is the only pedal-based power meter with integrated rechargeable batteries; a single charge ensures 50 hours of use at least. Tested and Guaranteed: Favero Electronics produces in-house each Assioma and thoroughly test it individually: fully satisfying the standards required by current regulations.
Every innovation in Quarq’s next-generation DZero platform is channeled into DFour. It embodies 10 years of Quarq technology advances with new features such as dual Bluetooth low energy and ANT+ wireless data transfer, the new Qalvin BLE app and compatibility with BB30 bottom brackets. Quarq power meters use their patented direct-force technology to precisely measure your physical performance throughout your ride. Their meter is located in the crankset, the heart of the bicycle, and because it gathers data from both legs, and it's located at the precise point where muscle energy is converted to forward movement, the power meter spider is the most accurate place to gather power data. 10K Temperature Compensation Eliminates variables caused by heat and cold to provide an unwavering record of your performance through all conditions. Built to Last An IPX7 waterproof rating, an easy-to replace CR2032 battery, a 2-year warranty, free firmware updates and acclaimed worldwide support. Easy to Use Manual and automatic zeroing make Quarq power meters truly set and forget. The chainrings are replaceable should your bike, discipline or ability change. Qalvin BLE with Bluetooth For iOS and Android. With any phone you can set zero offset, check battery, run diagnostics and update firmware. Free. Other Features DFour also features OmniCal (change chainrings without affecting accuracy) and AxCad (accelerometer cadence – no magnet).
Favero Assioma DUO Power Meter PedalsThese Power Meter Pedals from Favero have been designed for high-performance training sessions. Featuring a power sensor on both pedals, they benefit from leading technology to provide you with enhanced readings, not estimations. These pedals provide an in-depth overview of your pedal power, they are Bluetooth and ANT+ ready and include up to 50 hours of battery life. The ideal addition for riders who want to outperform every time. IAV Power System:Many power meters calculate the power using the Average Angular Velocity (AVG) per rotation, instead of the instantaneous Angular Velocity (REAL) value: this may introduce an additional error, up to 4.5% compared to the declared accuracy. Assioma, thanks to its exclusive IAV Power system and an integrated gyroscope, measures the actual instantaneous angular velocity to guarantee the same 1% degree of accuracy with any style of pedalling, even with oval chainrings.Automatic Temperature Compensation:Rain, snow, mud, or sweltering heat: Automatic Temperature Compensation (ATC) ensures exact, consistent watt measurements in any weather condition at temperatures between -10°C and 60°C.Waterproof, Resistant and the Lightest Ever Made:The lightest and most compact pedal-based power meter made by Favero: with no protruding elements, it does not interfere with the pedalling. Not even when cornering. Protected by a bi-component resin block, the power meter sensor is extremely resistant to shocks and fully waterproof.Features: Power Sensor: Power sensor on both pedals Power Measurement: Dual-sided power measurement Cadence Sensor: Included, inbuilt Gyroscope: Included, inbuilt Power Calculation System: IAV (Instantaneous Angular Velocity-based) IAV Cycling Dynamics: Yes Oval-chainring Compatible: Yes Battery Type: Rechargeable Lithium battery Battery Life: At least 50 hours Radio Communication: Bluetooth v4.0, ANT+ PWR profile (CT + PO) Accuracy Power Measurement: 1% Temperature Compensation: -10°C / +60°C Water Resistance Degree: IP67 Q-Factor: 54mm Compatible Cleats: Original LOOK Kéo and Favero cleats (red and black) Bike Type: Racing, Road Made in Italy Warranty: 2 years In The Box: • Left pedal with power sensor • Right pedal with power sensor • Battery charger including plugs (EU, US, UK, AU) • 2 two-meter long micro-USB/USB cables with 2 magnetic connectors • 2 red cleats float 6° (LOOK Kéo compatible) • Hex key and 4 washers for the installation • User manual Total Weight Per Pedal: 151.5g (battery included)Technologies: Easy to Install: Install and transfer your Assioma from one bike to another just like normal pedals, easily and without extra tools. Just screw them on your bike crank arms and you are ready to pedal! IAV Cycling Dynamics: Assioma supports the advanced metrics IAV Cycling Dynamics: IAV Power Phase and IAV Rider Position. These metrics, combined with the classic power data, allow analysing in details the pedalling technique and how the cyclist's position on the bike influences performances. IAV Power and Gyroscope: Unlike others, the measurements of Assioma are not affected by errors related to very irregular pedalling (e.g. sprint uphill) or the use of oval chainrings. This is because Assioma is able to detect the actual instantaneous angular velocity of the pedal stroke, thus giving you the degree of accuracy of 1% in any situation. Not only in the laboratory. Bluetooth and ANT+ SMART: Assioma communicates via Bluetooth and ANT+ with bike computers and smartphones, both Android and iOS. Real Dual-Sided Power Data: Assioma DUO provides dual-sided data through real measurements: taken individually on both the left and the right leg; this makes it possible to observe with accuracy not only the Total Power but also the L/R Balance, the Torque Effectiveness (TE), the Pedal Smoothness (PS), etc. Accuracy and Consistency: Assioma provides accurate watt measurements with great consistency and stability in the actual on-road use conditions and at any temperature between -10°C and 60°C. Thanks to the ATC (Automatic Temperature Compensation) too. Waterproof, resistant and light: Assioma is the lightest pedal-based power meter ever made. Thanks to its compact design, it never interferes with the pedalling. Not even when cornering. The power sensors are protected in a bi-component resin block, extremely resistant to shocks, and completely waterproof. Rechargeable and Green: Assioma is the only pedal-based power meter with integrated rechargeable batteries; a single charge ensures 50 hours of use at least. Tested and Guaranteed: Favero Electronics produces in-house each Assioma and thoroughly test it individually: fully satisfying the standards required by current regulations.Buy Favero Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
Built on to a Shimano's top-of-the-line Dura-Ace R9100 non-drive side crank arm, the Stages Gen 2 sensor is individually calibrated to ensure its accuracy. Stages produce power meters that both avid amateurs and professionals at the top of their game can trust. Reliable Readings In All Conditions To ensure consistency of measurement, Stages introduced a world-first feature to its power meters. This feature is called “Active temperature Compensation” and it is built in as standard to account for sudden temperature changes, which if not accounted for, would result in false and inaccurate data.
SRAM Red 1 AXS Road Power Meter ChainsetFeaturing two high-quality carbon crankarms, this power meter chainset is ready for training by delivering exceptional stiffness and strength without adding any unnecessary weight to your road bike. SRAM has also equipped this model with a single X-SYNC narrow/wide aluminium chainring for maximum chain control and precision as you beat your personal performance goals. With a power meter that delivers measurement readings that are accurate within +/-1.5% and aren't affected by climate conditions, you'll enjoy reliable results and performance data whatever the weather conditions. Coming complete with AXS wireless connectivity as well as renowned technologies such as DUB, DZERO, X-range and Exogram, this is a great choice of upgrade for reaching new goals and taking your training sessions up a notch.Road Bike Power Meter with AXS Wireless TechnologyAXS is SRAM's bike component integration system that connects electronic bicycle components and software. The SRAM AXS app allows riders to see battery status, change component behaviour, personalise controls, get maintenance reminders, and update firmware.Bluetooth and ANT+ CompatibleWith SRAM's power measurement technology that uses Bluetooth Low Energy (BLE) and ANT+ connectivity, you'll have the technology to get real results. Your riding and training efforts deserve power measurement that reaches the highest standards of accuracy to help you reach personal records. Because without accurate data, you can't know if you are making the progress you're aiming for. Another highlight is the chainring can be easily changed without requiring recalibration of the power meter. Non-aero chainrings can also be installed with a single tool, making gearing changes a breeze.Features: Crankarm Material: Carbon Chainring Material: Aluminium Use: Triathlon, Time Trial and Cyclocross Speed: 12 speed Bottom Bracket Compatibility: All SRAM Road DUB BBs Bottom Bracket Spindle Interface: DUB Bolt Circle Diameter (BCD): Direct Mount (DM) Chainline: 45.0mm Guard: No Guard Connectivity: ANT+ and Bluetooth Low Energy (BLE) Bottom Bracket Included: NoTechnologies: Single-ring drivetrain simplifies functionality. 48 and 50T variants have fully integrated power into a direct mount aero chainring. 36-46t variants have a spider-based power. Chainrings can be easily changed without requiring recalibration of the power meter. Power readings are accurate within +/-1.5% and aren't affected by climate conditions during a ride. SRAM X-SYNC wide-tooth, narrow-tooth chainring technology provides maximum chain control. Laser-etched chainring finish is more durable. DUB bottom bracket adds durability and simplicity. Non-aero chainrings can be installed with a single tool, making gearing changes a breeze. X-SYNC: SRAM X-SYNC 1x chainrings provide the highest level of performance and durability. The SRAM X-SYNC tall square teeth edges engage the chain earlier than traditional triangle shaped teeth. The sharp and narrow tooth profile, as well as rounded chamfer edges, help manage a deflected chain. To provide the best possible performance in muddy conditions, the X-SYNC chainrings have been designed with mud-clearing recesses for the inner chain links and rollers. Engineered in Germany, X-SYNC rings are an integral part of the SRAM 1x drivetrain. Accept no imitation. AXS: AXS is SRAM's bike component integration system that connects electronic bicycle components and software. The SRAM AXS app allows riders to see battery status, change component behavior, personalise controls, get maintenance reminders, and update firmware. DUB: The relationship between bottom bracket spindle and bearing is the core of DUB technology. It's where stiffness meets durability. We took it a step beyond conventional thinking and made everything simpler—better integrating the relationship between chainring, crank, spindle and bottom bracket. It's this approach to developing a complete system that equals better drivetrain performance. DZERO: Quarq's next-generation DZero power meter platform is named for the D0 Experiment, one of science's most accurate and innovative projects to detect subatomic particles moving at the speed of light. X-Range: Road bikes are faster and more capable than ever before, and riders are expanding what's possible with drop bar bikes. X-Range is gearing for today's road riding. We completely reimagined road gearing for wider range, more useful and smoother gear progression, as well as smarter shift settings—enabled by AXS. With X-Range, you're always in the right gear. Exogram: SRAM's Hollow Carbon Construction starts in the crank arm and extends into the crank's spider, maximizing the stiffness to weight ratio.Manufacturer's Part Numbers: 00.3018.209.170 Black 170mm 50T 00.3018.209.172 Black 172.5mm 50T 00.3018.209.175 Black 175mm 50T 00.3018.210.170 Black 170mm 48T 00.3018.210.172 Black 172.5mm 48T 00.3018.210.175 Black 175mm 48T 00.3018.211.170 Black 170mm 46T 00.3018.211.172 Black 170mm 40T 00.3018.211.175 Black 172.5mm 40T 00.3018.214.170 Black 172.5mm 46T 00.3018.214.172 Black 175mm 46T 00.3018.214.175 Black 175mm 40TBuy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
Whether you're training for an event or wanting to beat your previous goals, the Precision Pro is the ultimate component for the job. This dual-sided model (comes with both crank arms, left crank arm has strain gauges built-in) provides readings with an accuracy of within +/- 1% and can be used with your Shimano Ultegra R8000 drivetrain. 4iiii has built on what it learned when producing their left-side model (exceptional accuracy, lightweight design, ANT+ and Bluetooth compatibility, 3D power meter technology), by developing the technology even further for increased precision of the readings. This model is assembled within Shimano's stunning Ultegra R8000 crankset and measures the individual power output of each leg. ANT+ and Bluetooth connectivity allow you to wirelessly connect to it using your smartphone and a wide variety of devices. Accurate and consistent, its smartphone app also gives you access to the rider compensation scale and other useful features such as a battery status indicator. The app also allows you to enjoy over-the-air upgrade capabilities such as adding new features and updates. What's most impressive is its battery life lasts 100+ hours on a 2032 coin cell battery, so you'll benefit from precise and reliable data for longer than ever before. Lightweight and compact, this is a perfect choice of upgrade for riders who want to take their road cycling to the next level.
4iiii Precision Pro Ultegra R8000 Power MeterDesigned to give every level of rider a professional standard of performance analysis, this excellent onboard power meter measures your outputs to within one percent and uses wireless technology to relay the data straight to your device. Gauging your pedal power and cadence, this Shimano Ultegra R8000-compatible model features 3D power meter technology to read tri-axial crank strain, to produce super accurate riding data. Top-Performance, Precision Power Meter Compatible with a variety of ANT+ and Bluetooth Smart phones, computers and other devices, the Precision Pro syncs with the 4iiii app which lets you monitor the rider compensation scale and other analysis features. Fitting snugly on your crankset, it measures the individual outputs of both legs for a concise and unobtrusive experience and relays the information to your chosen gadget. Coming equipped with a 100+ hour coin cell battery, this top-level training companion helps to keep an eye on your progress mile after mile. Features: Compatibility: Shimano Ultegra R8000 drivetrain Battery Life: 100+ hours on 2032 coin cell battery Connectivity: ANT+, Bluetooth Smart head units, smartphones, and other 4iiii products Technology: 3D power meter technology (patent pending) measures tri-axial strain on your crank Accuracy: +/- 1% Upgrades: Over the air capability Weight: 25g Buy 4iiii Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
Tracking your power output and training data has never been easier or more accessible. Giant’s all-new Power Pro system delivers accurate power metrics through an integrated system that’s precise reliable and simple to set up. The pros know that the most effective training is smart training so get in the know and start training with power. FEATURES +/- 2 % accuracy at 150w/80rpm (each side) Giant-exclusive algorithm ensures accurate and stable data output with no environmental distractions Accelerometer allows magnet-free measurement LED indicator displays battery level and alerts recharge when power gets below 20% Integrated magnetic rechargeable design protects device from water and dust ingress IPX7 waterproof Bluetooth® Smart/ANT+ compatible for broad compatibility easy calibration and firmware updates. High-capacity lithium battery delivers up to 100 hours of riding on a single charge 2 year warranty world-wide Various crank lenghts available on either 50/34 or 52/36 SPECIFICATIONS Accuracy ± 2% Weight Left side 16g; Right side 16g Power range 0 – 3000 watts Cadence range 20-180 rpm Water Rating IPX7 Battery Rechargeable lithium-ion Battery Life 100 hours Connections Bluetooth® Smart/ANT+
4iiii Precision Pro Ultegra R8000 Power MeterDesigned to give every level of rider a professional standard of performance analysis, this excellent onboard power meter measures your outputs to within one percent and uses wireless technology to relay the data straight to your device. Gauging your pedal power and cadence, this Shimano Ultegra R8000-compatible model features 3D power meter technology to read tri-axial crank strain, to produce super accurate riding data. Top-Performance, Precision Power Meter Compatible with a variety of ANT+ and Bluetooth Smart phones, computers and other devices, the Precision Pro syncs with the 4iiii app which lets you monitor the rider compensation scale and other analysis features. Fitting snugly on your crankset, it measures the individual outputs of both legs for a concise and unobtrusive experience and relays the information to your chosen gadget. Coming equipped with a 100+ hour coin cell battery, this top-level training companion helps to keep an eye on your progress mile after mile. Features: Compatibility: Shimano Ultegra R8000 drivetrain Battery Life: 100+ hours on 2032 coin cell battery Connectivity: ANT+, Bluetooth Smart head units, smartphones, and other 4iiii products Technology: 3D power meter technology (patent pending) measures tri-axial strain on your crank Accuracy: +/- 1% Upgrades: Over the air capability Weight: 25g Buy 4iiii Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
4iiii Precision Pro Ultegra R8000 Power MeterDesigned to give every level of rider a professional standard of performance analysis, this excellent onboard power meter measures your outputs to within one percent and uses wireless technology to relay the data straight to your device. Gauging your pedal power and cadence, this Shimano Ultegra R8000-compatible model features 3D power meter technology to read tri-axial crank strain, to produce super accurate riding data. Top-Performance, Precision Power Meter Compatible with a variety of ANT+ and Bluetooth Smart phones, computers and other devices, the Precision Pro syncs with the 4iiii app which lets you monitor the rider compensation scale and other analysis features. Fitting snugly on your crankset, it measures the individual outputs of both legs for a concise and unobtrusive experience and relays the information to your chosen gadget. Coming equipped with a 100+ hour coin cell battery, this top-level training companion helps to keep an eye on your progress mile after mile. Features: Compatibility: Shimano Ultegra R8000 drivetrain Battery Life: 100+ hours on 2032 coin cell battery Connectivity: ANT+, Bluetooth Smart head units, smartphones, and other 4iiii products Technology: 3D power meter technology (patent pending) measures tri-axial strain on your crank Accuracy: +/- 1% Upgrades: Over the air capability Weight: 25g Buy 4iiii Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
Ridden by the pros, PRECISION PRO dual-side power meters deliver all the benefits of our left-side model (exceptional accuracy, lightweight design, ANT+ and Bluetooth compatibility, 3D powermeter technology), plus a specific breakdown of left and right wattage. Perfect for those who need specific power output from each crank side, or anyone who simply wants the best power meter on the market.The PRECISION PRO Ride Ready comes pre-installed on a new Shimano crankset.Key Features: 3D power meter technology (patent pending) measures tri-axial strain on your crank, Accurate, consistent data, Lightweight, compact design, Battery status indicator via 4iiii app, Compatible with ANT+, Bluetooth Smart head units, smartphones, and other 4iiii products, User-friendly app and configurable rider compensation scale factor, Easy setup and maintenance, Over-the-air upgrade capability for adding new features and updates,.Specifications: Weight: 25 grams (power meter only), Data accuracy: +/- 1% error margin, Battery life: 100+ hours on 2032 coin cell battery, Battery status indicator: Alert at 15% battery power.