Graining

Graining is a condition where a tire's surface becomes rough and uneven, reducing grip and performance during a race.

This occurs when small pieces of rubber tear away from the tire surface and then stick back onto it, creating a texture similar to sandpaper. Graining typically happens when tires are too cold, the compound is too hard for track conditions, or the car setup is suboptimal.

Drivers experiencing graining will notice reduced grip, especially in corners, and potentially unpredictable handling. Teams combat this issue by properly warming tires, selecting appropriate compounds, adjusting car setup, and modifying driving style to be smoother when tires are cold.