[s-cars] Tire Pressures

[steve powers]

Trevor:

> F1 treat tyre pressure as a safety issue so they now have auto deflating &
> inflating devices. These sense over & under pressure & react accordingly.

huh?!?!?  I follow F1 fairly religiously and have never heard or seen this. 
Can you provide a reference, please? There are air compressors onboard F1 
cars, but I'm pretty sure they only pump up the pneumatics for the 
valvetrain.

Thanks!

Steve