This article provides guidance on device compatibility, installation, operation, data transmission, and lifecycle management for TraX devices.
Compatibility & Device Selection
Are TraX devices compatible with all trucks?
TraX devices are designed for installation on the majority of trucks, trailers, buses, and similar commercial vehicles.
Three different device sizes are available to ensure compatibility across various vehicle types. The correct device variant is determined by the wheel stud size of the vehicle.
To confirm compatibility with a specific brand and model, verify the wheel stud dimensions and consult SKF documentation or support if needed.
How do I determine which device should be installed on a specific vehicle?
Device options and compatibility details are described in the Technical Specification (Connected Version).
How many devices should be installed on each wheel?
One device should be installed per wheel.
Development & Testing
What types of devices or firmware are used for development?
SKF can provide devices tailored for development and testing purposes. See the Data Frame Parsing Guide for more information.
Installation
What are the recommendations regarding device installation?
Follow the standard wheel installation procedures specified for the vehicle.
The maximum fixing torque for the TraX device is 725 Nm.
Additional installation details are available in the Backplate Options article.
What should I do if an obstacle prevents device installation?
If wheel covers or other components prevent installation, contact the fleet manager to determine whether the obstacle can be removed.
Operation & Capabilities
What information does the TraX device provide?
The information available depends on how the device is used. Key data includes:
- Wheel end temperature
- Bearing failure detection
- Battery status
- Device operational status
Do I need additional equipment to capture information from the TraX device?
There are two usage options:
1. Standalone use
The device operates independently and communicates status information via integrated LED indicators. No additional equipment is required.
2. Integration with a Telematics Service Provider (TSP)
When integrated with a telematics platform, the full functionality of the device can be utilized. This enables remote monitoring, data analysis, and fleet-wide visibility.
What is the BLE broadcasting range?
The maximum RF output power of the TraX device ranges from -4.68 to -3.42 dBm (at approximately 25°C ambient temperature).
Actual communication distance depends on vehicle type, installation position, and surrounding materials. Dense loads, such as liquids or metal structures, may reduce signal range.
What data format does the device transmit?
Wheel end and device status information is transmitted in an encoded format using BLE advertising frames.
See the Technical Specification (Connected Version) for more information.
What is the acceptable data packet loss rate?
Telematics Service Providers (TSPs) can determine packet loss by evaluating the frame counter included in transmitted data frames.
The device is designed to balance transmission frequency and battery lifetime.
Under normal conditions:
- Vibration-related alerts are broadcast approximately every 30 minutes.
- When temperature increases, broadcasting frequency increases accordingly to better track rapid thermal changes.
An acceptable packet loss rate is up to 5%.
Battery & Lifecycle
Is the battery rechargeable?
No. The TraX device uses a non-rechargeable battery. This design minimizes device cost and eliminates the need for charging operations in the field.
What is the expected battery lifetime?
Battery lifetime is estimated to be up to five years.
Actual lifespan depends on:
- Driving conditions
- Usage patterns
- Environmental factors
The device includes an internal diagnostic function to monitor battery status.
What should be done with decommissioned or faulty devices?
Decommissioned Devices
Devices with functional batteries may be recommissioned and reused on other axles or vehicles.
Devices That Detected a Bearing Failure
Devices that detected a bearing failure should be reset using the TraX mobile application before reuse.
After inspection and repair of the wheel end, the device may be reinstalled.
Devices with Drained Batteries or Hardware Failures
Devices with:
- Drained batteries
- Wheel End Monitoring (WEM) failures
- Temperature sensor failures
- Physical damage
must be returned to SKF. Contact your SKF sales representative for instructions.