Are 195 65 15 tires interchangeable with 195 60 15?

No, 195/65R15 tires are not directly interchangeable with 195/60R15 tires. The first number (195) indicates the tire width in millimeters, and both sizes have the same width. However, the second number (65 vs. 60) represents the aspect ratio, which affects the tire's overall diameter and sidewall height. Using tires with different aspect ratiOS can impact vehicle handling, speedometer accuracy, and overall performance, so it’s best to stick to the manufacturer-recommended size.