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How to Remove Rubber Buildup in Iracing Testing

Fast steps for iRacing drivers on how to remove rubber buildup in iracing testing: restart or create a private test to reset track rubber and regain consistent grip.

If you’re dealing with how to remove rubber buildup in iracing testing, the quickest fix is to reset the session or start a private test so the track state goes back to clean. You’re in the right place — below are clear, no‑nonsense steps you can do inside iRacing now.

Quick Answer — how to remove rubber buildup in iracing testing

In short: exit the current session and restart a new test session with a clean track (private or freshly created). If you host the session, use the session restart/reset option so the sim clears accumulated rubber and marbles from the racing line.

What’s really going on

iRacing simulates rubber being laid down on the racing line and marbles (crumbled rubber) off-line as cars run laps. Rubber on the line increases grip; marbles off-line reduce grip and feel slippery. In testing sessions the track state persists while the session runs or when other drivers have already run lots of laps, so you may inherit a “rubbered-in” line or heavy marbles that change handling.

Step-by-step fix

1. Leave the current session. Save your setup if needed so you don’t lose work.
2. Create a new private test session (or host one). Private tests start with a clean track unless someone else runs on it.
3. If you’re hosting a public session, use the session control to Restart/Reset the session. That clears the accumulated rubber/marbles.
4. Confirm the track state: watch the track info panel or timing screen for “track state” or observe grip returning to expected levels.
5. If you need different grip quickly, change time-of-day or track temperature in session settings — that can alter grip and is faster than long running stints.
6. If others are using the same server, switch to another empty test server to guarantee a clean surface.

Extra tips / checklist

• Use private tests when doing baseline setup runs to avoid unpredictable rubber from other drivers.
• Do short “out‑lap only” tests and reset between runs if you’re comparing setups and need identical conditions.
• If you’re tuning over multiple sessions, note track temperature and time of day — those affect grip as much as rubber.
• Don’t rely on joining a near-empty public test; some servers persist rubber from earlier activity. Private or newly started sessions are most reliable.
• If you see heavy marbles off-line, get back on the racing line to avoid unpredictable sliding during setup testing.

FAQs — how to remove rubber buildup in iracing testing

Q: Can I clear rubber without leaving the session?
A: Only if you’re the host and use the session restart/reset control. Otherwise you must exit and start a new session.

Q: Why does the car feel different after a few laps?
A: Rubber lays down on the racing line (more grip) and marbles build off-line (less grip). That changes handling as the session progresses.

Q: Will changing weather/time remove rubber?
A: Changing time or temperature affects grip but doesn’t remove rubber itself. Restarting the session is the reliable way to reset track rubber.

Q: Does tire wear affect this?
A: Yes — worn tires and marbles off-line amplify instability. Use fresh tires when testing baseline setups.

Wrap-up

Resetting the session or using private tests is the fastest, most reliable way to remove rubber buildup in iRacing testing. Next session: create a private test, run your baseline laps, and you’ll get repeatable track conditions for setup work.