1. Tire Width: Both tires have a section width of 175 millimeters, which indicates the tire's width from the sidewall to sidewall.
2. Aspect Ratio:
- 70-series tire: The "70" in 175-70-13 refers to the aspect ratio of the tire. This ratio represents the percentage of the tire's width (175mm) that makes up its sidewall height. In this case, 70% of 175mm = 122.5mm.
- 80-series tire: The "80" in 175-80-13 represents a higher aspect ratio. 80% of 175mm = 140mm.
So, the primary difference is in the sidewall height. The 175-80-13 tire has a higher sidewall height (140mm) compared to the 175-70-13 tire (122.5mm).
Effects of Aspect Ratio:
1. Ground Clearance: The higher sidewall of the 175-80-13 tire provides slightly increased ground clearance compared to the 175-70-13 tire. This can be beneficial in situations where more clearance is needed, such as when driving on rough roads or encountering obstacles.
2. Ride Comfort: The higher sidewall of the 175-80-13 tire can provide a slightly more comfortable ride as it absorbs more road impacts and vibrations due to its increased flexibility.
3. Speedometer Accuracy: The difference in tire diameters may affect the accuracy of the vehicle's speedometer. Since the 175-80-13 tire has a larger overall diameter, the speedometer may show slightly lower speeds compared to the actual speed when compared to the 175-70-13 tire.
4. Handling Characteristics: The 175-70-13 tire may provide better handling and cornering stability due to its stiffer sidewalls and lower sidewall flex compared to the 175-80-13 tire.
Overall, the choice between these tire sizes depends on your specific vehicle and driving preferences, taking into account the differences in sidewall height, ground clearance, ride comfort, speedometer accuracy, and handling characteristics. It's important to consult with a professional or the vehicle manufacturer to ensure that the chosen tire size is suitable for your vehicle.
