Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/80-17 | 225/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.39 (695.8) | 27.74 (704.7) | 0.35 (8.9) 1.3% |
| Width inches (mm) | 6.5 (165) | 8.86 (225) | 2.36 (60) 36.4% |
| Circum. inches (mm) | 86.06 (2185.92) | 87.16 (2213.88) | 1.1 (27.96) 1.3% |
| Sidewall Height inches (mm) | 5.2 (132) | 4.87 (123.75) | -0.32 (-8.25) -6.3% |
| Revolutions per mile (km) | 736.23 (457.47) | 726.93 (451.69) | -9.3 (-5.78) -1.3% |
225/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.26 mph (32.6 km/h) |
| 25 mph (40.23 km/h) | 25.32 mph (40.75 km/h) |
| 30 mph (48.28 km/h) | 30.38 mph (48.9 km/h) |
| 35 mph (56.33 km/h) | 35.45 mph (57.05 km/h) |
| 40 mph (64.37 km/h) | 40.51 mph (65.2 km/h) |
| 45 mph (72.42 km/h) | 45.58 mph (73.35 km/h) |
| 50 mph (80.47 km/h) | 50.64 mph (81.5 km/h) |
| 55 mph (88.51 km/h) | 55.7 mph (89.65 km/h) |
| 60 mph (96.56 km/h) | 60.77 mph (97.8 km/h) |
| 65 mph (104.61 km/h) | 65.83 mph (105.95 km/h) |
| 70 mph (112.65 km/h) | 70.9 mph (114.1 km/h) |
| 75 mph (120.7 km/h) | 75.96 mph (122.24 km/h) |
| 80 mph (128.75 km/h) | 81.02 mph (130.39 km/h) |
| 85 mph (136.79 km/h) | 86.09 mph (138.54 km/h) |
| 90 mph (144.84 km/h) | 91.15 mph (146.69 km/h) |
| 95 mph (152.89 km/h) | 96.22 mph (154.84 km/h) |
| 100 mph (160.93 km/h) | 101.28 mph (162.99 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1850 | 2149 | 2314 | 2417 | 2527 | 2606 | 2692 | 2795 | 2936 | 3078 | 3235 | 3361 | 3590 | 3842 | 4038 | 4164 | 4235 | 4495 | 4857 | 5644 |
Better Fuel Economy Factory Ratios Increased Power
