Introduction
Congratulations on becoming an owner of SRM X-Power PowerMeter pedals! This manual provides essential instructions on features, important safety information, and guidance for setting up and using your X-Power pedals.
How the X-Power Pedal Works
Each X-Power pedal measures the applied force and cadence in real-time. This data is then used to calculate torque and power, which is transmitted to your bike computer. The X-Power pedals are compatible with ANT+™ and Bluetooth® 4.0 or higher. Featuring a rechargeable battery, double seal technology, and a robust integrated design, they are built for years of reliable use. Please follow each step in this manual carefully to enjoy your ride with X-Power!
Package Content
- SRM X-Power pedal pair (SPD compatible)
- SPD compatible cleats including screws
- 3m USB-A to micro USB-B cable
- Charge adapter X-Power to Micro USB-B
- Quick start guide including safety instructions and warranty information
Safety / Warnings
⚠️ WARNING - TO AVOID SERIOUS INJURIES
Ensure you follow the instructions in this manual during installation. The X-Power pedals are designed for intentional release only and do not automatically release during a fall. If you have any doubts during installation, seek assistance from an authorized retailer or visit the support page at www.srm.de. Incorrect installation can lead to damage not covered by warranty, serious injury, or death. Familiarize yourself with your new pedals before riding and practice engaging and disengaging them while stationary and then in a safe riding location.
Weight Limit: X-Power pedals are designed for cyclists up to 120 kg (265 lbs).
Pedal Category
The X-Power pedal is rated Category 3 according to the international standard ASTM F2043-13. This category covers operation on rough trails, rough unpaved roads, and rough terrain requiring technical skills, including jumps and drops less than 61cm (24 inches). For detailed explanations, visit www.srm.de.
⚠️ CAUTION - DANGER FOR ELECTRONIC EQUIPMENT
The magnetic field from the charge adapter, which contains strong NdFeB magnets, can alter calibration or damage sensitive electronic instruments. Keep the adapter away from magnetic storage media (e.g., credit cards, memory cards) and electronic devices like computers, laptops, digital cameras, and mobile phones.
Warranty
SRM X-Power PowerMeter pedals are warranted against defects in materials or workmanship for three years from the date of purchase. SRM will, at its discretion, repair or replace components failing under normal use within this period at no charge for parts or labor. The customer is responsible for any transportation costs. Damage due to normal wear and tear is not covered. For further information and warranty exceptions, visit www.srm.de/support/warranty/. SRM reserves the right to refuse warranty claims deemed fraudulent. The SRM PowerMeter is defined as: shaft, pedal-body, rechargeable battery, internal electronics, seals, and covers.
Technical Data
| Specification | Value |
|---|---|
| Power Measuring Accuracy | ± 2% |
| IP Protection | IP 67 |
| Battery Type | 70mAh rechargeable Lithium Polymer battery |
| Voltage | 3.7 V DC / 5V DC Charging |
| Battery Run Time | Up to 35 hours of riding time |
| Operating Temperature | -20 / +60°C (-4 / 140°F) |
| Charging Temperature | +10 / +45°C (50 / 113°F) |
| Wireless Frequency Protocol | ANT+™ 2.4GHz @ 4dbm nominal, Bluetooth® 2.4GHz @ 4dbm nominal |
| Weight | 345g per Pair (not including cleats) |
Installation of X-POWER
Setting up X-Power pedals is quick and easy. Follow the installation steps below and ensure both pedals are fully charged as described on page 8. Install the X-Power app on your mobile phone and follow the in-app installation process.
❗ IMPORTANT
It is essential to perform the installation process using the X-Power App whenever the pedals are removed, installed, or tightened. Failure to do so may result in incorrect data display.
Pedal Installation
Apply grease to the pedal threads. Use a 15 mm open-end wrench (width >6 mm) to install the pedals into your crankset. The recommended minimum torque is 30Nm (22 lbf-ft). The pedal sides are clearly marked with 'R' (Right) and 'L' (Left).
? NOTE
Do not use a cone wrench, as it may damage the charging port.
Thread Type: Right pedal - right-hand thread; Left pedal - left-hand thread.
? NOTE
Pedal clearance to the chain and frame should be greater than two millimetres.
Illustration shows applying grease to pedal threads and using a 15mm wrench. A close-up shows the pedal spindle and crankset interface, indicating a required clearance of greater than 2mm between the pedal and the chain/frame.
Charging the Pedals
To charge the X-Power pedals, attach the magnetic charge adapter to a USB wall charger (not included) using the enclosed USB cable. Connect the adapter to the charge port on the pedal shaft. A blinking red LED indicates the pedal is charging. Once fully charged, the LED will blink green. A full charge cycle takes approximately three hours.
? NOTE
When charging, the internal electronics enter standby mode automatically. To reactivate the pedal, remove the charger and turn the pedal.
A blinking yellow LED indicates cadence for the first few pedal revolutions. A blinking red LED signifies that the pedal battery is low and requires recharging.
? NOTE
Crank boots on your crankset may obstruct the charge port, making charging impossible when mounted. Consider using pedal spacers or removing the boot if necessary.
Illustration shows a USB Micro-B cable connecting to a magnetic charge adapter, which attaches to the pedal's charge port. A status LED is visible on the pedal.
X-POWER APP DOWNLOAD
To configure and calibrate your pedals, download the X-Power application (available for iOS and Android). Enable Bluetooth® on your phone and spin both pedals to turn them on. Follow the on-screen instructions within the app to connect.
❗ IMPORTANT
For correct operation, you must follow the installation steps detailed on pages 10-11.
The app interface displays power, cadence, battery status, and allows for offset calibration and Zwift™ compatibility settings. A QR code is provided for easy app download.
Installation of X-POWER PEDALS
Step 1:
Open the X-Power App and search for your pedals. Ensure both pedals are turned on and Bluetooth® is enabled.
Step 2:
Select the pedal shown. ? NOTE: Only the right pedal will be displayed initially; the left pedal connects automatically once the right pedal is connected.
Step 3:
The 'Status' screen provides information such as battery level. If the left pedal is not visible, proceed with the initial installation by selecting the 'Installation' tab.
Step 4:
Follow the instructions in the Installation Wizard carefully. If the left pedal was not found automatically, you can search and select it on the next screen. Ensure the left pedal is charged and turned on.
Installation Steps 5-8
Step 5:
Set the correct crank length for your crankset.
Step 6: Zero Load Calibration
Perform zero load calibration with no pressure on the pedals to ensure accurate force measurement. ? NOTE: Ensure there is no load on the pedal during offset calibration. Continue to the next step upon successful calibration. Repeat this step if calibration fails.
Step 7: Angle Calibration
Ensure the right crank is positioned directly downwards (at 90 degrees to the ground) and the bike is on a level, flat surface for this calibration step.
Step 8:
If the angle calibration is successful, you are ready to ride! If angle calibration fails, repeat the step until completion, ensuring the crank does not move during the process.
Using X-POWER
Before the first ride: Spin the X-Power pedals to turn them on and connect to your bike computer. Refer to page 14 for pairing instructions and pages 15-16 for mounting cleats and adjusting bindings. Practice engaging and disengaging the cleats, first while stationary and then while riding in a safe location.
Zero Load Calibration
To ensure accurate power measurement, perform a zero calibration before starting your ride. Trigger calibration via the X-Power app or your bike computer by navigating to the sensor menu and selecting the X-Power pedals. The calibration button should be available within the menu. If paired via Bluetooth®, ensure both pedals are calibrated separately.
Temperature Compensation
X-Power pedals are temperature compensated. However, avoid significant temperature changes during the zero load calibration process, as rapid temperature shifts can lead to measurement errors if calibration is performed incorrectly.
? WHAT DOES IT MEAN EXACTLY?
If your bike has been stored in a garage overnight, it is recommended to perform the calibration process, especially if there are significant differences in outside temperatures (hot or cold).
Other App Features
Start Screen
Ensure Bluetooth® is enabled on your device when connecting to the X-Power pedals. Spin the pedals to activate them. Connect to the drive-side pedal; the non-drive pedal will connect automatically if available.
Status
The Status screen provides an overview of essential information, including serial numbers, battery status, and crank length. Offset calibration can be triggered, and Zwift™ compatibility can be enabled or disabled.
Zwift Compatibility
Enabling Zwift™ compatibility is only necessary when connecting X-Power pedals via Bluetooth® to a device running Zwift™. Disable this feature when riding outdoors using a Bluetooth® device. ANT+™ connections are unaffected.
Installation
The app guides you through the quick installation process of the X-Power pedals to ensure they are set up correctly. Refer to pages 10-11 for detailed installation instructions.
Realtime
The Realtime tab displays power, torque, and power balance for each pedal individually, as well as combined values.
Info
The Info tab provides necessary information for debugging errors and indicates if firmware updates are available.
PowerMeter Pairing
X-Power pedal PowerMeter supports both ANT+™ and Bluetooth® connections. To view data on your device, you must pair the X-Power pedals with your device. Depending on your device, you may see one or more sensors. Select either Bluetooth® or ANT+™ to connect your bike computer.
Pairing via ANT+™
Ensure both pedals are turned on when pairing. Search your device's sensor menu for 'add/pair sensor' and select 'power sensor' if necessary. With ANT+™, only the drive-side serial number will be displayed and needs to be paired. The non-drive pedal (Slave) and drive-side pedal (Master) function as a distributed system, sending all data, including power balance, via the Master to your bike computer.
Pairing via Bluetooth®
Ensure both pedals are turned on when pairing. Search your device's sensor menu for 'add/pair sensor' and select 'power sensor' if necessary. When pairing via Bluetooth®, you must add both pedals separately. Ensure both drive and non-drive pedals are added to obtain correct measurements, including power balance.
Diagram illustrating ANT+ pairing showing a bike computer receiving signals from both pedals (R+L). Diagram illustrating Bluetooth pairing showing a smartphone receiving signals from both pedals (R and L) separately.
Binding and Cleat
Adjust the spring force to achieve the optimal cleat holding force required for releasing the cleats from the bindings. The adjustment bolt is located at the rear of each binding. Use a 3mm allen key to adjust the spring tension. Clockwise rotation increases tension, while counter-clockwise rotation decreases it. Ensure both bindings are adjusted equally.
Position the cleat (A), followed by the cleat adapter (B), onto the sole of the shoe. Temporarily tighten them with the cleat mounting bolts (C) using a 4mm allen key. Ensure the arrow on the cleat points towards the front of the shoe. The cleats are compatible with both left and right pedals. The recommended tightening torque is 5 - 6 Nm (3.7 - 4.4 ft-lbf).
Illustration shows the cleat (A), cleat adapter (B), and mounting bolts (C) being attached to a cycling shoe. An allen key is shown tightening the bolts. An arrow indicates the correct orientation of the cleat towards the front of the shoe.
Engaging and Releasing the Cleats
Engaging the Cleats with the Pedal
Press the cleats into the pedals with a forward and downward motion until the cleat engages with the bindings.
Releasing the Cleats from the Pedal
These cleats release only when the heel is twisted outward.
? NOTE
Practice engaging and releasing the cleats and adjust the holding force if necessary.
Illustration shows a cycling shoe engaging with the pedal mechanism via a forward and downward motion. Another illustration shows releasing the cleat by twisting the heel outward.
Maintenance
To keep the X-Power pedals running smoothly, disassembly is not required. Simply use a dry cloth to wipe away dirt and debris around the green outer seal.
? NOTE
Do not use solvents, as they can damage the seals or other internal parts of the pedal, potentially leading to further damage. Avoid using high-pressure cleaners, as water ingress can damage the components.
Once clean, apply a small amount of lubricant, such as light grease or oil, to the lip of the seal. Spin the pedal a few turns to distribute the lubricant evenly. Wipe away any excess.
Diagram shows a hand wiping the pedal seal with a dry cloth (step 1) and applying lubricant to the seal lip (step 2).
Troubleshooting / FAQ
My bike computer shows no power or cadence
Check if the X-Power pedals are fully charged, turned on, and paired with your bike computer. Follow the installation process with the X-Power app and check the realtime data tab to ensure correct data display.
I see three different sensors when pairing the pedals to my bike computer
Your bike computer likely supports both ANT+™ and Bluetooth®, displaying all detected sensors. Ensure you pair only one protocol (either ANT+™ or Bluetooth®). Refer to page 14 for pairing guidance.
Power data is incorrect / Left - right balance is off
Repeat the installation process using the X-Power app (page 10). Verify that you entered the correct crank length and oriented the drive-side crank downwards during angle calibration. If issues persist, contact SRM; the 'Info' page in the X-Power app can assist with diagnosis.
I already have SPD cleats mounted on my shoes
The X-Power binding is compatible with all SPD-compatible cleats. However, worn cleats may feel looser than the new ones provided. SRM recommends using new cleats for improved engagement and power transmission. See page 15 for instructions on adjusting the binding and mounting cleats.
The body or binding is worn out. How can I replace them?
Remove the four Torx T10 screws on each side of the pedal to detach the old binding. Mount a new binding set and tighten the new screws to a maximum torque of 4 Nm (3 lbf.ft). Adjust the spring tension as described on page 15. The complete pedal body can only be replaced by an authorized SRM Service Center; please contact SRM for details.
How do I know I am on the most up-to-date firmware?
Connect to your X-Power pedals using the X-Power app on your phone. You will be notified in the app if new firmware is available.
Declaration of Conformity
This device has been tested and found to comply with Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in residential installations. The equipment generates, uses, and can radiate radio frequency energy. If not installed and used according to instructions, it may cause harmful interference to radio communications. There is no guarantee that interference will not occur in a particular installation. If this equipment causes harmful interference to radio or television reception (which can be determined by turning the equipment off and on), the user is encouraged to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and the receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
Operation is subject to two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Note: Modification to this product will void the user's authority to operate this equipment.
This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device.
Contact Us
SRM GmbH | Rudolf-Schulten-Str. 6 | 52428 Jülich | Germany
Version: V1.1 / March 2020 © 2020 SRM GmbH www.SRM.de
All copyrights and trademarks are the property of their respective owners.
For more information, visit www.srm.de.
