Exakt power meter pedals represent a significant collaboration between two industry leaders: LOOK and SRM. These pedals are designed to provide cyclists with highly accurate power data while maintaining the aerodynamic profile and durability expected of high-end cycling components. Whether you are a professional athlete or a dedicated enthusiast, understanding how to properly install, calibrate, and maintain these pedals is essential for getting the most out of your training.
This guide provides a comprehensive overview of everything you need to know about these power meters. We will walk through the installation process, the initial setup via the dedicated mobile application, and the daily maintenance routines required to ensure your data remains consistent. By following these steps, you can focus on your performance knowing your power metrics are reliable and precise.
Understanding the Exakt Power Meter System
The Exakt system is built into the spindle of a LOOK carbon pedal body. This design is unique because it combines SRM’s legendary power-sensing technology with LOOK’s expertise in pedal manufacturing. The result is a power meter that is lightweight, stiff, and fully integrated.
There are generally two versions available: the Single and the Dual. The Single version measures power from the right pedal and doubles it to provide a total power reading. The Dual version measures both legs independently, allowing for advanced metrics like left/right balance, torque effectiveness, and pedal smoothness.
Key Technical Specifications
- Battery Life: Approximately 100 hours of active riding time.
- Connectivity: Dual-band support for both ANT+ and Bluetooth Smart.
- Water Resistance: IPX7 rated for protection against the elements.
- Weight: Approximately 155 grams per pedal.
Step-by-Step Installation Guide
Proper installation is the most critical factor in ensuring data accuracy. Unlike standard pedals that you simply tighten and forget, power meter pedals require specific alignment and torque to function correctly. You will need a 19mm wrench and an 8mm Allen key for this process.
1. Prepare the Crank Arms
Before installing the pedals, ensure your crank arms are clean and free of debris. Remove any old grease from the threads. It is helpful to apply a very light layer of fresh bicycle grease to the pedal threads to prevent seizing, but avoid over-greasing the contact points near the sensors.
2. Align the Pedals
Each pedal has a specific orientation. Look for the alignment mark on the pedal spindle. When the pedal is installed, this mark needs to be aligned with the crank arm. This ensures that the strain gauges inside the spindle are positioned correctly to measure the force you apply during each pedal stroke.
3. Tighten to the Correct Torque
Using your 19mm wrench, tighten the pedals to the manufacturer’s specified torque (usually around 35-40 Nm). If the pedals are too loose, they may move slightly under load, causing “ghost” power readings. If they are too tight, you risk damaging the sensitive electronics inside the spindle.
Connecting to the Mobile App
Once the pedals are physically installed, the next step is to configure them using the dedicated mobile application. This app is available for both iOS and Android devices and serves as the primary interface for firmware updates and technical adjustments.
Activating the Pedals
The pedals enter a sleep mode to conserve battery when not in motion. To wake them up, simply rotate the crank arms a few times. Once they are awake, open the app on your smartphone and ensure Bluetooth is enabled. The app should automatically detect the sensors.
Setting the Installation Angle
One of the most important features of the app is the ability to set the “installation angle.” Because every crank arm and pedal thread is slightly different, the app needs to know exactly where the pedal sits in its rotation. Follow the on-screen prompts in the app to perform the alignment procedure, which usually involves positioning the cranks vertically and following a calibration sequence.
Pairing with Your Cycling Computer
After the initial app setup, you can pair the pedals with your GPS cycling computer (such as a Garmin, Wahoo, or Hammerhead). The pedals broadcast data via ANT+, which is the preferred connection for most cycling head units due to its stability.
Searching for Sensors
Navigate to the “Sensors” menu on your head unit and select “Add New Sensor.” Choose “Power.” Your device should find the pedals within a few seconds. If you are using the Dual version, you only need to pair the master pedal (usually the right side), and it will automatically include the data from the left side.
Configuring Data Fields
To get the most out of your power meter, configure your head unit to display the following fields:
- 3-Second Average Power: This smooths out the instantaneous jumps in power for easier pacing.
- Lap Power: Useful for intervals or specific segments.
- Cadence: The pedals have built-in accelerometers to measure your RPM.
- Left/Right Balance: (For Dual users) To monitor leg symmetry.
Calibration and Zero Offset
To maintain accuracy, you must perform a “Zero Offset” before every ride. This process tells the power meter what the “zero” point is when no force is being applied to the pedals. This is necessary because changes in temperature and atmospheric pressure can slightly shift the baseline of the strain gauges.
How to Perform a Zero Offset
- Ensure your bike is upright and stable.
- Position the crank arms vertically (6 o’clock and 12 o’clock positions).
- Make sure your cycling shoes are NOT clipped into the pedals.
- Select the “Calibrate” or “Zero Offset” option on your cycling computer.
- Wait for the confirmation message and a numerical value (the offset value).
If the offset value is wildly different from your previous ride, it may indicate that the pedals have loosened or that there is a mechanical issue. Consistency in this number is a good sign of a healthy system.
Maintenance and Battery Care
These power meters are built to last, but they do require basic maintenance. Because the electronics are housed within the spindle, you should avoid using high-pressure power washers directly on the pedal axle. Instead, wipe the pedals down with a damp cloth after messy rides.
Charging the Pedals
The system uses a magnetic charging connector. You do not need to remove the pedals from the bike to charge them. Simply attach the magnetic lead to the port on the end of the pedal spindle. A full charge takes about two hours and provides roughly 100 hours of ride time. It is a good habit to charge them once every few weeks depending on your riding volume.
Firmware Updates
Periodically, the manufacturers release firmware updates to improve battery life, connectivity, or data accuracy. Check the mobile app once a month to see if an update is available. Always ensure your pedals are fully charged before starting a firmware update to prevent the process from being interrupted.
Troubleshooting Common Issues
While the Exakt system is highly reliable, you may occasionally encounter issues. Most problems can be solved with a few simple checks.
Inaccurate Power Readings
If your power seems significantly higher or lower than usual, first check the torque of the pedals. A loose pedal is the most common cause of erratic data. Next, perform a fresh installation angle alignment through the mobile app. If the issue persists, ensure that your crank length is set correctly in both the app and your cycling computer.
Connectivity Drops
If your head unit keeps losing the signal, check the battery level first. Low voltage can weaken the ANT+ signal. If the battery is full, ensure there are no other electronic devices (like powerful LED lights or older speed sensors) creating interference near the pedals.
Conclusion
The Exakt power meter is a sophisticated tool that can transform your cycling training by providing laboratory-grade data on every ride. By taking the time to install the pedals correctly, performing regular zero offsets, and keeping the firmware up to date, you ensure that your investment continues to provide value for years to come. Reliable data is the foundation of any successful training plan, and with these pedals, you have the precision you need to reach your goals. For more guides on cycling technology and maintenance, feel free to explore our other articles on home bike repair and digital training tools.