Q: How does caster impact your vehicle dynamics?

If you had zero caster, what that means is you would have a perpendicular line to the floor traveling directly through the hub and your contact patch would remain completely flat through your steering axis.

If you were to add positive caster, what that means is the overall line between the upper and lower ball joints through the hub would essentially point in front of the tire and what that means is as you go through your steering access the outside of the loaded tire would lift and as it lifts that creates a dynamic camber and dynamic camber as we discussed previously creates additional contact patch and additional contact patch means more grip now the main reason that cars are designed with positive caster from the factory is because it allows the car to self-center when coming out of corners now while the Model 3 Performance doesn’t necessarily come with adjustable caster it’s actually kind of built into the engineering of the multi-link suspension and what that essentially means is the caster itself changes through the overall steering arc so even though it’s not adjustable, you do get the added benefit of having better caster angles through cornering.