you have to really screw up to hit the walls!! i know i have hit them! and hit them a few times. lol. But that's because i was playing how close can i get before i touch. As for the tire, the last time i hit it, it wasn't filled with concrete lol. the first day i took my car out to the track after finishing it i smashed that tire , i just kept going.
I wouldn't worry too much about the walls. you can control the car before you smash them. I have lost control a few times in 3 third gear doing around 70mph spinning out and managed to not smash the wall. Also if you are just running laps and not hanging out the rear then you should be in even more control then those of us that are out there drifting.
This was the aftermath of hitting that tire. broken bumper, broken motor mount, broke the intercooler, smashed the intercooler pipe. Nothing i couldn't fix over a weekend.
