The MK Indy is a lightweight, high-performance sports car that is designed for racing and track driving. While the choice of tires for a race car can have a significant impact on its handling and performance, it's important to note that there are many factors that can influence the way a car handles on the track, including suspension setup, weight distribution, and aerodynamics.
That being said, there are some reasons why the MK Indy might drive better on track with a 13"" 60 profile tire than a 15"" 50 profile tire:
Weight: The MK Indy is a very lightweight car, and the smaller 13"" wheels and tires are also lighter than the larger 15"" wheels and tires. This can reduce unsprung weight, which can improve handling and responsiveness.
Sidewall height: The 60 profile tire on the 13"" wheel has a taller sidewall than the 50 profile tire on the 15"" wheel. This can provide more compliance and absorb more of the imperfections on the track, providing more grip and better handling.
Steering response: The smaller 13"" wheel and tire package can provide quicker steering response and more precise handling due to the reduced rotational mass and moment of inertia.
Grip: While the 15"" wheel and tire package can provide more grip due to the wider contact patch, the 13"" wheel and tire package may provide sufficient grip for the lightweight MK Indy, especially on tight and twisty tracks.
Overall, the choice between a 13"" 60 profile tire and a 15"" 50 profile tire for the MK Indy will depend on the specific requirements of the race track and the driver's preferences. Both tire options have their advantages and disadvantages, and it's important to consider these factors carefully to determine the optimal tire setup for the car and the track.
"