I have a 2013 Silverado 1500 LT with a 5.3L engine. My current wheels are 20". I am wanting to change the wheels to a different size for a little bit better ride. Which wheel and tire set would have better mpg? 255/75R17, 275/70R17, or 275/65R18?

When considering a change in wheel and tire size for improved ride quality and potential better fuel economy, it's essential to understand how different tire sizes can affect your vehicle's performance. 1. **Tire Size Comparison**: - **255/75R17**: This tire has a diameter of approximately 31.0 inches and a width of 255 mm. It usually provides a good balance between grip and fuel efficiency, along with a comfortable ride due to a larger sidewall. - **275/70R17**: This tire has a diameter of approximately 32.0 inches and a width of 275 mm. This tire is slightly larger, which may improve the ride quality but could also slightly decrease fuel economy due to increased rolling resistance. - **275/65R18**: This tire has a diameter of approximately 32.0 inches but has a wider stance due to 275 mm width. It can offer good handling but may not offer as cushioned a ride compared to the 255/75R17 if you prioritize sidewall height. 2. **Ride Quality and Fuel Economy**: - Tires with a taller sidewall (like the 255/75R17) tend to absorb bumps and provide a smoother ride. They typically contribute positively to fuel economy because their rolling resistance is often lower compared to wider tires. - The 275/70R17 and 275/65R18, being wider, might provide slightly better traction performance, but they could also result in a decrease in fuel economy, especially if the vehicle's weight and load requirements push them beyond their efficiency limits. 3. **Fuel Economy Considerations**: - Generally, a narrower tire (like the 255/75R17) produces less rolling resistance and can lead to better MPG compared to wider tires, assuming other factors remain equal. - With a proper alignment and maintaining the correct tire pressure, the differences in MPG might not be drastic but can still be notable over time. ### Conclusion For the best potential fuel economy and improved ride quality, the **255/75R17** tire would likely be your best option. It offers a good balance between comfort and efficiency compared to the wider options. Be sure to verify that your truck's setup (including suspension) can accommodate any changes in tire width and diameter while ensuring proper clearance.