Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-17 | 225/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.5 (647.8) | 27.74 (704.7) | 2.24 (56.9) 8.8% |
| Width inches (mm) | 5.31 (135) | 8.86 (225) | 3.54 (90) 66.7% |
| Circum. inches (mm) | 80.12 (2035.12) | 87.16 (2213.88) | 7.04 (178.76) 8.8% |
| Sidewall Height inches (mm) | 4.25 (108) | 4.87 (123.75) | 0.62 (15.75) 14.6% |
| Revolutions per mile (km) | 790.78 (491.37) | 726.93 (451.69) | -63.85 (-39.67) -8.1% |
225/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.76 mph (35.01 km/h) |
| 25 mph (40.23 km/h) | 27.2 mph (43.77 km/h) |
| 30 mph (48.28 km/h) | 32.64 mph (52.52 km/h) |
| 35 mph (56.33 km/h) | 38.07 mph (61.27 km/h) |
| 40 mph (64.37 km/h) | 43.51 mph (70.03 km/h) |
| 45 mph (72.42 km/h) | 48.95 mph (78.78 km/h) |
| 50 mph (80.47 km/h) | 54.39 mph (87.54 km/h) |
| 55 mph (88.51 km/h) | 59.83 mph (96.29 km/h) |
| 60 mph (96.56 km/h) | 65.27 mph (105.04 km/h) |
| 65 mph (104.61 km/h) | 70.71 mph (113.8 km/h) |
| 70 mph (112.65 km/h) | 76.15 mph (122.55 km/h) |
| 75 mph (120.7 km/h) | 81.59 mph (131.3 km/h) |
| 80 mph (128.75 km/h) | 87.03 mph (140.06 km/h) |
| 85 mph (136.79 km/h) | 92.47 mph (148.81 km/h) |
| 90 mph (144.84 km/h) | 97.91 mph (157.56 km/h) |
| 95 mph (152.89 km/h) | 103.34 mph (166.32 km/h) |
| 100 mph (160.93 km/h) | 108.78 mph (175.07 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 |
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