Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/70-16 | 225/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.85 (707.4) | 27.74 (704.7) | -0.11 (-2.7) -0.4% |
| Width inches (mm) | 8.46 (215) | 8.86 (225) | 0.39 (10) 4.7% |
| Circum. inches (mm) | 87.49 (2222.36) | 87.16 (2213.88) | -0.33 (-8.48) -0.4% |
| Sidewall Height inches (mm) | 5.93 (150.5) | 4.87 (123.75) | -1.05 (-26.75) -17.8% |
| Revolutions per mile (km) | 724.16 (449.97) | 726.93 (451.69) | 2.77 (1.72) 0.4% |
225/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.92 mph (32.06 km/h) |
| 25 mph (40.23 km/h) | 24.9 mph (40.08 km/h) |
| 30 mph (48.28 km/h) | 29.89 mph (48.1 km/h) |
| 35 mph (56.33 km/h) | 34.87 mph (56.11 km/h) |
| 40 mph (64.37 km/h) | 39.85 mph (64.13 km/h) |
| 45 mph (72.42 km/h) | 44.83 mph (72.14 km/h) |
| 50 mph (80.47 km/h) | 49.81 mph (80.16 km/h) |
| 55 mph (88.51 km/h) | 54.79 mph (88.18 km/h) |
| 60 mph (96.56 km/h) | 59.77 mph (96.19 km/h) |
| 65 mph (104.61 km/h) | 64.75 mph (104.21 km/h) |
| 70 mph (112.65 km/h) | 69.73 mph (112.22 km/h) |
| 75 mph (120.7 km/h) | 74.71 mph (120.24 km/h) |
| 80 mph (128.75 km/h) | 79.69 mph (128.26 km/h) |
| 85 mph (136.79 km/h) | 84.68 mph (136.27 km/h) |
| 90 mph (144.84 km/h) | 89.66 mph (144.29 km/h) |
| 95 mph (152.89 km/h) | 94.64 mph (152.3 km/h) |
| 100 mph (160.93 km/h) | 99.62 mph (160.32 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
