Wet classification in Time Trial

I don't like or hate the rain, but when it happens to be present in ranked games, it's complicated. I'm not talking about light rain, but intense rain.

For my part I don't have any "wet" settings. I just change the "dry" setting. Performance is correct in a race where we use intermediate tires until the track dries. But in a race where we use "rain" tires, the performance is not there.

It's clear that I lack experience, performance and settings in the rain.