Increased noise after installing new tires is primarily due to greater tread pattern resonance in the new tires, which amplifies road noise. Another possible reason is the difference in aspect ratio between the new and old tires - new tires with lower aspect ratios have larger contact patches with the road surface, consequently generating more noise. Additionally, the harder rubber compound of new tires may also contribute to increased noise levels. Other reasons for increased noise with new tires include: Tire pressure factors: Tire pressure is closely related to noise levels, significantly affecting the amount of road noise. Overinflated tires become more rigid, leading to increased noise. Conversely, underinflated tires are equally problematic as they increase the contact area with the road surface, raising the friction coefficient and resistance, which not only increases noise but also reduces fuel efficiency. Failure to perform wheel balancing: If technicians don't perform wheel balancing after tire replacement, uneven resistance and wear distribution across tires may occur, resulting in irregular tread wear (known as "tire cupping"). New tires that are wider than the old ones have larger contact patches with increased friction coefficients, leading to more noticeable noise. This heightened noise level often manifests as a noticeable humming sound that drivers find abnormal compared to previous tire performance.
