it’s correct to say that, to understand the goodness of the rear set-up, I can see the look of the rear tires?
I’m not very experienced in setup and sometimes, when I don’t feel comfortable driving, I struggle to understand when I have to ride better or when I have set-up problems. For this reason I was told to look the rear tires:
A rough and dry tire like this indicates that the kart is sliding too much.
A smooth “wet” looking tire like this indicates that the set-up is optimal.
On the other hand, when there is a lot of rubber picked up from the ground on the tire, you have to unload the rear.