As Jaime knows, my tires are screwed to the rims and I do not have tubes in them...just have to be diligent about checking the air pressure... Which as racers we can be a bit anal about that anyway...
__________________
If the car feels like it is on rails, you are probably driving too slow. -Ross Bentley
Horsepower is how fast you hit the wall.
Torque is how far you take the wall with you.
“If everything seems under control, you're just not going fast enough.” Mario Andretti
If you can turn, you ain't going fast enough...