Why is there such a big difference between offline and online?

I built up a BMW 850CSI and dailed in a really grippy tune in test drive mode. I took it online in a B class hopper room and I was oversteering every corner! Is there really a major difference between offline and online? Or does the game force a certain tyre type for the B class racing?

Really frustrated with this. Let me know if anyone knows why this is happening.

Was it the same track and conditions that u tuned on? Alot of tracks handle very differently. Some tunes just don’t work on some tracks.

OH jeez… You’re right. It must’ve been the track…

I gotta tune on every track now… Yikes.