Is the yellowing on the edge of newly purchased tires a quality issue?

[JoelLynn]

New car tire edge yellowing is relatively common and considered a normal phenomenon. Here are the main reasons for this occurrence: 1. Oxidation of new car tire wax: This is mainly because new tires are coated with a layer of tire wax when leaving the factory. When the vehicle is parked outdoors for extended periods, especially in high-temperature environments, this wax can oxidize. This condition generally doesn't affect usage. 2. Brake pad rust: The brake pads of passenger cars contain iron elements that wear down and produce powder during braking. When these iron particles encounter water, they oxidize into rust-colored liquid that flows onto the tires. If not cleaned promptly, these rust stains will adhere to the tires over time, turning them yellow.