Background

In real world racing involving cars with multiple dry tire compounds, the sanctioning bodies put specific requirements on how tires must be selected through the race. This is done to ensure race strategy does not get too stale. In iRacing we implement these rules as options for hosted races and enable them in Official sessions mimicking series that have these rules.

TABLE OF CONTENTS

• Tire Compound Change Rule
  • Requirement
  • Punishment
  • Prerequisites
  • Official Series Using this Rule
• Start on Qualifying Tire Compound Rule
  • Requirement
  • Punishment
  • Prerequisites
  • Official Series Using this Rule:
• Reference
  • Cars Equipped with Multiple Compounds

Tire Compound Change Rule

Requirement:

Drivers must complete a racing lap on at least two different tire compounds during the race. 

Punishment:

Drivers that do not meet this requirement and finish the race are disqualified.

Prerequisites:

• All cars in the session must have multiple dry tire compounds available.
• The track must be classified as a Road course.

Official Series Using this Rule:

Mercedes-AMG W12 E Performance Series

- iRacing Grand Prix Tour

- Grand Prix Series

- Grand Prix Series Sprint - Fixed

IndyCar (Dallara IR18) Note: this rule is inactive when these series race at Ovals.

- IndyCar iRacing Series

- IndyCar Series - Fixed

- IndyCar Series - Open

Dallara iR-01

- Dallara Formula iR

Start on Qualifying Tire Compound Rule

Requirement:

Drivers must start the race on the same type of tire compound they used to set their qualifying lap. 

Punishment:

Drivers are not allowed to break this rule. Attempting to start the race on an unallowed tire will force the user on to the allowed tire. 

Prerequisites:

• All cars in the session must have multiple dry tire compounds available.

Official Series Using this Rule:

Dallara iR-01

- Dallara Formula iR

Reference

Cars Equipped with Multiple Compounds

• Dallara iR-01
• Dallara IR18
• McLaren MP4-30
• Mercedes-AMG W12 E Performance