Positive Effects (generally with larger wheels, but dependent on other factors like tire type):
* Handling: Larger wheels, especially when paired with lower-profile tires (tires with shorter sidewalls), can improve handling responsiveness. This is because the taller sidewall on smaller wheels flexes more under cornering, leading to slightly less precise steering. Lower profile tires on larger wheels offer stiffer sidewalls, resulting in better steering feel and quicker reactions.
* Braking: Larger wheels can sometimes accommodate larger brake rotors, leading to improved braking performance.
* Appearance: This is subjective, but many find larger wheels aesthetically pleasing, enhancing the car's look.
Negative Effects (generally with larger wheels):
* Ride Comfort: Lower-profile tires on larger wheels offer a harsher ride. They absorb bumps and imperfections in the road less effectively, resulting in a less comfortable driving experience.
* Fuel Economy: Larger, heavier wheels increase the rotational inertia of the car's wheels and tires. This means it requires more energy to accelerate and decelerate, negatively impacting fuel efficiency. The added weight also increases the load on the engine and drivetrain.
* Acceleration: The increased rotational inertia from larger, heavier wheels also reduces acceleration slightly.
* Cost: Larger wheels and lower-profile tires are generally more expensive to replace.
* Damage Susceptibility: Lower-profile tires are more prone to damage from potholes and road debris, potentially leading to expensive repairs or replacements.
Important Note: The actual impact of wheel size depends heavily on the overall tire package. A larger wheel with a taller sidewall tire might not have the same negative impacts as a larger wheel with a low-profile tire. The specific tire compound and construction also play a huge role. Manufacturers carefully choose wheel and tire combinations to balance performance and comfort for a specific vehicle. Simply putting larger wheels on a car without considering the tire specifications can significantly alter the car's handling, ride, and performance characteristics, potentially negatively.
