You can then recalibrate your controller by launching the SIM (in a Test session for example) and it should then prompt you to recalibrate your controller.
Click Options and make sure you are in the Drive tab
in the Input Calibration section, click either Steering, Pedals or Gearbox - depending on what you want to recalibrate
Article ID: 123
Created On: Thu, Mar 25, 2010 at 8:40 PM
Last Updated On: Wed, Mar 11, 2015 at 3:53 PM
Authored by: Susan Flint [firstname.lastname@example.org]
Online URL: http://faq.iracing.com/article.php?id=123