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RACELOGIC Support Centre

Tyre Traction


The ‘Tyre Traction’ test is a plugin for the VBOX Test Suite software.

The test itself allows the user to compare the traction forces and wheel slip of different tyres.

In order to successfully complete the test, the user will need access to the driven wheels speed sensors as well as a throttle position sensor.

Ribbon Bar

The Tyre Traction test has a unique 'Test Setup' ribbon bar, from which the test and test area can be configured.

VBTS Test Setup Ribbon Bar 2.png

Note: Ribbon bar icons may move/ resize dependent on the Software window size.


VBTS Test Setup Test.png


The 'Configure' button displays a pop up window whereby the parameters of the test can be defined.


The 'Report' button creates a report from the current test results.

Maths Channel

Allows the user to create unique maths channels. For more information on maths channels, please see the ‘Maths Channels’ section.

Save Settings

The 'Save Settings' button will save this individual test setup and will appear in the ‘Saved Settings’ area of the ‘Add Test’ window.

This test will also be added to the list of Tyre Traction tests under the 'Tyre' icon on the 'Home' tab for easy switching of the current test.

Export (Ctrl+E)

The 'Export' button displays a drop down menu which allows the user to export either the selected results or line results to either a .csv or .txt file. It is also possible to export the data to a .vbo file for later analysis without the need to take the file from the VBOX's compact flash card. This can also be accessed by using the keyboard shortcut 'Ctrl+E'.


VBTS Gate.png

Add Gate (space)

Pressing the ‘Add Gate’ button will add a virtual gate to the chart and map area at the point of the cursor, indicated by green coloured lines. The currently selected gate is indicated by a dark blue coloured line. Once a gate has been added, the gate width can be specified. A gate can also be added by using the keyboard space button.

IMPORTANT - When adding a gate, the vehicle must be travelling greater than 0.8 km/h in order to ascertain the heading of the gate.


Allows the user to rename the currently selected gate line (start/finish, end of bath, etc.).


Deletes the currently selected gate.


Allows the user to either export the created gate(s) as a .spl file for reusing at a later date or using with another VBOX product, or import a previously saved or provided .spl gates file. When imported, gates will be added in the order in which they were saved within the .spl file.

Data Column

VBTS Test Setup Data Column.png


The 'Add' button adds a column to the test results area. Selecting this button will bring up a drop down window where the user can select a channel to display in the test results window.

Sort Ascending/Sort Descending

The 'Sort Ascending/Descending Buttons' will sort the values based on the currently selected column in the results area.


VBTS Test Setup Run.png

Select All (Ctrl+A)

The 'Select All' button allows the user to tick every run in the results area at once. This can also be accessed by using the keyboard shortcut 'Ctrl+A'.

Deselect All (Ctrl+E)

The 'Deselect All' button allows the user to de select every run in the results area at once. This can also be accessed by using the keyboard shortcut 'Ctrl+E'.

Edit Data

the 'Edit Data' button allows the user to enter session specific data such as tyre specification.

Help (F1)

VBTS Help.png

Pressing this 'Help' button will automatically open an internet browsing window and load the relevant section of the Racelogic Support Centre. This page will only be displayed if there is a valid internet connection. If there is no valid internet connection, a cached version of the relevant section (from the last software update) will be presented in PDF form. This can also be accessed by using the keyboard shortcut 'F1'.

Test Configuration

Selecting the 'Configure' button will display a pop up window where the user can define the parameters of the test. These include the start and end conditions, as well as the pass conditions.
Use the up and down buttons VBTS Settings Collapse.png to the right of the parameters to Expand and Collapse the parameter headings.

Tyre Traction Settings.png

Test Details

Within this area, the user can define the following Test details:

  • Test Request Number
  • Date
  • Track
  • Vehicle
  • Vehicle mass (kg) – This will be used to calculate the Force value
  • Driver

These entered details will form the header of the report page.

Test Condition

Start Speed

This parameter denotes at what speed the test will start.

Note: In Racelogic’s experience, we do not recommend starting this test from zero due to the presence of noise that occurs at low GPS and Wheel speeds.

End Slip (%)

This parameter denotes at what percentage wheel slip the test will end at.

Wheel Speeds

There are separate drop down boxes that allows the user to choose the channel that the software will use to calculate the Front Left, Front Right, Rear Left and Rear Right wheel speeds.

There is also a tick box to specify which are the driven wheels to allow for both Two and Four wheel drive vehicles.

Selecting 'Omit Calibration' will calculate the wheel slip channel from the start of the test without calibration.

Slip Analysis

The Slip analysis area allows the user to enter a Slip% Low and High condition that will denote the upper and lower limits that will be used in the ‘Area under the curve’ evaluation.

Throttle Rate Pass Conditions


This allows the user to select which channel the software will reference when calculating Throttle Rate.


To ensure that the tests are undergoing the same rate of throttle application, it is possible to enter upper and lower limits for the Average and Standard Deviation of the Throttle application.

If any test run exceeds the set criteria, the run will be highlighted in the results table for easy identification.

These parameters are an optional channel that is only required if the user wishes to look at the throttle application.

Completing a Test

To start an online test, the user must first select the correct COM port from the ‘Online’ drop down menu in home tab. Once connected to a VBOX, the dashboard will change to show the 'START', 'STOP' and 'RESET' buttons.

Starting, Stopping and Resetting a Test

By pressing the 'START' button, the software will add a tab to the Test Results area ready to be populated with results once the start and end criteria have been met. The 'START' button will also change to a 'PAUSE' button, allowing the user to pause the test. To resume the test, simply press the 'RESUME' button.

To finish a test, simply press the 'STOP' button. This will stop all open tests. Once the stop button has be pressed, future results cannot be added to that results tab. Pressing the 'START' button will open up a new results tab, however once the stop button has been pressed, the user will be required to calibrate the wheel speeds again before a new test can be started.

If, for any reason, a mistake has been made during the test, it is possible to restart the test by pressing the 'RESET' button and again this will require a calibration of the wheel speeds.

Calibrating the Wheel Speeds

To allow for different wheel diameters to be easily and consistently used in the test, the software has an auto calibrate function that automatically applies a scaling factor to the CAN wheel Speeds to match the GPS Speed.

When the user first presses the 'START' button, a dialogue window will appear that contains the calibration instructions.

VBTS Calibration.png

To successfully calibrate the wheel speeds, the user must drive at constant speed of 20 km/h (+/- 2 km/h) for 5 seconds, ensuring not to rapidly accelerate, decelerate or any other manoeuvre that may induce wheel slip. Once this period has been completed, the software will display a ‘Calibrated’ message and the test is able to be started.

IMPORTANT - Unless 'Omit Calibration' is selected within the Test Configuration, the calibration period is also required when in ‘Offline’ mode, so it is extremely important that the unit is logging before the calibration procedure is carried out, otherwise the software will not produce any test results.


Test Results Area

The test results area is the area that displays all of the results from the current test. Within this area it is possible to include/exclude results from the chart area, display the average/max/min values and also easily identify any runs which have not met the pass criteria.

Every time a new test is started (via the 'START' button on the dashboard), or a new file is loaded, a new tab will be added to the test results area, allowing the user to switch between separate tests or files and compare runs from each. A session can be removed from the results area by pressing the ‘x’ icon on the tab.

Rename file

It is possible to rename the session tab by double clicking on the tab header. Changing the session tab within the software will automatically change the name of the locally saved .vbo file.

Session Data

By pressing the 'Edit Data' button  steering_wheel1 (11).jpgnext to the name of the file/run or in the ‘Test Setup' ribbon bar, it is possible to edit the session information for that test. This includes:-

  • Tyre Size
  • Pattern Name
  • Rim Size
  • Inflated Pressure
  • Purpose
  • Comments

When in 'Offline' mode, this information will be saved into the .vbo file meaning that this information will be recalled every time the file is loaded into VBOX Test Suite.

When in 'Online' mode, a newly-created session will be populated with session data from the previous session.

This information will be included in the test report to allow the user to understand which result applies to which tyre.

Note: This data is purely optional and has no effect on the test or test results.

Once the session information has been completed, it is possible to export the data to a .vbses file. This file will contain all the session information that can then be imported into the open session information field.

Result Columns  

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Along the top of the Test results area are some default columns. These columns are:-

  • Run – Indicates which run number the results relate to, with run one being the first run completed. There is also a selection box that, when ticked, includes that run in the graph and into the Average/Max/Min/Standard Deviation calculations. Once selected, a coloured square will appear to indicate which colour this run is displayed as on the graph.
  • Time – The total time the run has taken.
  • Distance – The total distance travelled in that run.
  • Force Max – The maximum force experienced during the run.
  • Slip @ Force Max – The slip % experienced at the maximum force measurement.
  • Speed (max) – The maximum speed attained during the run.
  • Throttle rate Max – The maximum rate of throttle application.
    Note: This result is only displayed if a Throttle Rate channel has been selected.
  • Throttle Rate Average – The average rate of throttle application.
    Note: This result is only displayed if a Throttle Rate channel has been selected.
  • Throttle Rate StdDev – The standard deviation of the rate of throttle application.
    Note: This result is only displayed if a Throttle Rate channel has been selected.
Adding a Column

It is possible to add columns to the test results area by selecting the ‘Add’ button on the ‘Test Setup' tab in the ribbon bar. Selecting this button will display a drop down list of all available channels which the user can select to display as a results column. By default, this value is displayed as an ‘At End’ value, whereby the column will display the value of that parameter at the end of the run.

It is also possible to right click anywhere in the test results area and select the ‘Add’ option from the dropdown menu.

To remove a column, simply select the ‘x’ icon that appears when you hover over the column title. If a column has been removed, it can be added again by selecting the ‘Add’ button and choosing the desired channel.

Editing a Column

As default, a column is added as an ‘At End’ condition. It is possible to change this by selecting the column title you wish to edit (once selected, the column will be highlighted in yellow) and changing the condition in the ‘data column’ area in the ‘Test Setup’ tab of the ribbon bar.

VBTS Edit Column.png

It is possible to choose the following conditions for the main results:-

  • Avg – The mean average of the parameter during the run.
  • Max – The maximum value of the parameter during the run.
  • Min – The minimum value of the parameter during the run.
  • Delta – The difference between the start and end value of the parameter.
  • Std Dev – The standard deviation of the parameter during the run.
  • At Start – The value of the parameter at the start of the run.
  • At End – The value of the parameter at the end of the run.
  • Gate (if a gate has been added) – The value of the parameter at the crossing of the specified gate line (e.g. Start/Finish).

It is also possible to change the displayed parameter, by using the other drop down menu on the ribbon tab and selecting the desired parameter.

Sorting the Results

It is possible to either sort the result in either ascending or descending order. To do this, first select the desired column and then click either the ‘Sort Ascending’ or ‘Sort Descending’ buttons from the ribbon bar. This action can also be performed by right clicking in the test results area.


It is possible to filter results by right clicking on a value within the cell results table (e.g. Time (s)). You can then choose to include only results with a value equal to the selected value or that have a value that is <= than or >= than the selected value for that channel. Multiple channels can be filtered, a notification bar above the results shows which filters are applied. To remove the filters, click on the 'x' within this bar.

Copying Cells (Ctrl+C), Rows or Columns

Individual results cells can be copied so that they can be pasted into another piece of software. To copy a cell, select the required cell, right click and then select ‘Copy’ or use the keyboard shortcut 'Ctrl+C'. To select multiple cells, either left click with the mouse and drag or hold down the 'Ctrl' when selecting. To select all cells between 2 cells, hold down the 'Shift' key when selecting.

It is also possible to copy an individual row, column or the entire results table. This is achieved by right clicking the required row or column and selecting ‘Copy Row’, ‘Copy column’ or ‘Copy all’.

Renaming a Column (F2)

To rename a column, you can either Double Click on the column title, right click the required column and select ‘Rename Column’ or use the keyboard shortcut 'F2' whilst the column is highlighted. Renamed columns will be included within an exported file and a generated report.


Right clicking anywhere in the test results area and selecting the ‘Export’ option from the dropdown menu will replicate the function of 'Export' within the Ribbon Bar.

Average/Max/Min/Standard Deviation Values

It is possible for the software to automatically calculate the Average/Max/Min/Standard Deviation values of all relevant runs by ticking the selection box next to the relevant run number.

Once more than one result has been selected, the average, maximum and minimum values will be displayed, and once more than two results have been selected, the standard deviation of the selected runs will be also be displayed.

Selecting the tick box next to the ‘Avg’ line will add a moving average ‘best fit’ curve to all of the selected runs.


Along with the usual dashboard functionality, the ‘Tyre Traction’ test has some extra options that can be displayed to the user.

By selecting the 'Add Gauge' button from the dashboard tab, a drop down menu will appear whereby the user can select 'Test' and then the desired parameter to be displayed. On selection, a gauge will be automatically added to the dashboard. Any gauges displaying a result of a test, such as an average or maximum value, will have a 'Result' icon VBTS Dashboard Guage Result.png to the left of the gauge name to indicate that it is either a result of the previous run if viewing live data, or the currently selected run if viewing a saved file.

All Result Column parameters are also available as a gauge.

Showing Test Results on the Dashboard

It is possible to display the time and distance test results from the last run completed as a gauge on the dashboard.

VBTS Dashboard Test Guage1.png

It is also possible to show the current run number on the dashboard to give an easy, clear indication of the amount of runs completed. An 'OK Runs' gauge can be added to indicate how many runs have met any specified pass conditions.

VBTS Run Ok Runs Gauge.png

Distance/Time Since Run

The user can also add gauges to the dashboard that show a live value of either time or distance since the completion of the last run.

timedist_since_run (1).png

Creating a Report

VBOX Test Suite allows the user to turn the results table into a custom report whereby the user can easily compare the average data between different sets of tyres.

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Once the user has added the 'average' to a session as well as completing the test details in the Test configuration screen and the session information for each session, the user can create a custom report using the 'Report' button in the ribbon bar. This will create a report that contains the test details, a chart of the selected runs and the session information.

The chart will show tell tale lines that relate to the ‘Slip Analysis’ high and low constraints that were entered in the test configuration. These lines denote the upper and lower limits of the 'Area Under the Curve' analysis.


The session data will be displayed as a table of results that contains:-

  • Tyre Size
  • Rim Size
  • Pattern Name
  • Pressure
  • Force Max (N) – The Maximum force attainted by the 'average' run.
  • Area under the curve – The area under the 'Average' curve.
  • Purpose
  • Comments

The user can then choose to print or save this report.