As I said yesterday let's talk about tire compound.
Tires are one of the most important parts of a car, and the biggest expense in racing I think because of a flawed performance-durability ratio.
Tires produce grip by:
-coefficient of friction between tire and racing surface;
-suspension design;
-tire construction.

I've been using medium hardness compounds in 1/8th since I started racing 10+ years ago, first because the medium compound was good(Medial Pro tires) and because you couldn't find soft compounds sold here. So I adapted my way of tuning around that medium compound, kind of like you saw in F1 with different tire brands catered to different car/suspension designs.

As suspension design is set by the designer, it can't be easily reverse engineered to understand what level of friction it works the best, but as you may guess is set to a broad spectrum/aimed to what rules state about tire construction. Tire construction is somewhat limited, we have different compounds and tread patterns and that's it. Tire dimensions are pretty much locked and usually there's a insert that works and no one deviates from it. Friction can be changed by chemical additives but I am against them and they are illegal, except in 1/10th scale. That leaves another option to have more friction, increase tire load.
Coefficient of friction is f=F/W, where F is the force needed to make the tire slip and W is the weight exerted by the tire to the racing surface. In simple terms, chemical alterations to tire construction change F and mechanical alterations change W. So if one can't change the compound(chemical) that leaves the mechanical part, most add weight(XB8, MBX7), others add roll(more weight transfer by roll centers/stiffer suspension). As you can guess, adding weight is good to grip but bad to everything else performance wise(if the driver is OK with the loss in engine performance I see no issue). On the other hand, roll centers and suspension tuning have no negative impact in overall performance if tuned to tire construction and grip because if the car grips the same as it would with softer tires it would just roll more and as you can control how quickly and how much weight it transfers performance is the same albeit more difficult to reach.

On the spreadsheet, the harder the tire compound the lower the Suspension Frequency and vice versa. Hope that with more knowledge one can suit tires and setup to available grip and get more life out of tires.