Join hundreds of racers just like you! We love to help answer questions and race together.

How to Do Multiclass Racing in Iracing

Learn how to do multiclass racing in iRacing: quick steps to enter events, manage traffic, and avoid penalties. For iRacing drivers who want to fix this right now.

If you’re asking how to do multiclass racing in iRacing, the short answer is: pick the correct class when entering an event, use class filters and in-sim displays, and treat faster/slower cars predictably — the steps below fix most problems quickly. You’re in the right place to set it up and resolve common confusion.

Quick Answer — how to do multiclass racing in iracing

To run multiclass racing in iRacing, enter an event that lists multiple classes, select your class in the entry screen, enable the class timing/graphics in the UI (or HUD), and drive with class awareness (clean overtakes, predictable lines). This prevents penalties and improves SR (safety rating — iRacing’s incident score).

What’s really going on

Multiclass racing mixes different-speed cars in one session (for example, prototypes with GT cars). iRacing treats each class separately for qualifying and results but shares the same track. Confusion usually comes from:

Picking the wrong class at entry.
Not using class filters or the class column in results/timing.
Failing to recognize faster cars closing quickly (or slower cars holding inconsistent lines).

iRacing records incidents and position changes per class, but collisions between classes still hurt your safety rating. So the core: set your class correctly and adapt your driving to traffic.

Step-by-step fix

Open the event entry screen and confirm the event lists multiple classes (look for class names like LMP/GT or Class A/B).
On the entry page click the class dropdown and choose the correct class — don’t assume the default is right.
In the practice/qualify session enable the class timing column (Options > Timing > Show Class) or use the on-screen HUD filter to display only your class.
Practice how different classes behave: faster cars will late-brake; slower cars are stable but may take defensive lines. Focus on predictable driving.
Use mirrors, spotter and the mini-timing screen to identify approaching faster cars; lift off and hold your line when being lapped.
After the race, check incident logs and split penalties by class to learn what cost SR or iRating.

Extra tips / checklist

Always verify class at the pit/engine start: some events allow last-minute class changes.
Turn on car class colors and relative timing in live telemetry to spot class gaps instantly.
When overtaking across classes: communicate (mirrors/blinker), pick a clean side, and don’t force contact.
If a faster car is approaching, hold your line; sudden moves cause most multiclass incidents.
Treat blue flags seriously — you won’t always be auto-pushed off track; be proactive.

FAQs

Q: Can I change class after joining an event?
A: Generally you must change before the session starts from the entry screen. Some special sessions allow class change in the pits — check event rules.

Q: Do penalties count across classes?
A: Yes. Incidents between different classes still count toward your safety rating and can produce penalties in the same way.

Q: How do I spot the faster class during a race?
A: Use the live timing class column, class color coding, and pay attention to closing speed. Faster classes usually have distinct car names and team colors.

Q: Will qualifying be separate for each class?
A: Usually yes. iRacing typically scores qualifying by class even though all cars are on track together.

Short wrap-up

Set your class at entry, enable class timing/visuals, and practice predictable behavior in traffic. Do those three things and most multiclass confusion and penalties vanish — try a short multiclass test session to build confidence.