Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/75-17 | 255/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.47 (799.3) | 32.06 (814.2) | 0.59 (14.9) 1.9% |
| Width inches (mm) | 9.65 (245) | 10.04 (255) | 0.39 (10) 4.1% |
| Circum. inches (mm) | 98.86 (2511.08) | 100.7 (2557.88) | 1.84 (46.81) 1.9% |
| Sidewall Height inches (mm) | 7.23 (183.75) | 7.03 (178.5) | -0.21 (-5.25) -2.9% |
| Revolutions per mile (km) | 640.9 (398.24) | 629.17 (390.95) | -11.73 (-7.29) -1.8% |
255/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.37 mph (32.79 km/h) |
| 25 mph (40.23 km/h) | 25.47 mph (40.98 km/h) |
| 30 mph (48.28 km/h) | 30.56 mph (49.18 km/h) |
| 35 mph (56.33 km/h) | 35.65 mph (57.38 km/h) |
| 40 mph (64.37 km/h) | 40.75 mph (65.57 km/h) |
| 45 mph (72.42 km/h) | 45.84 mph (73.77 km/h) |
| 50 mph (80.47 km/h) | 50.93 mph (81.97 km/h) |
| 55 mph (88.51 km/h) | 56.03 mph (90.16 km/h) |
| 60 mph (96.56 km/h) | 61.12 mph (98.36 km/h) |
| 65 mph (104.61 km/h) | 66.21 mph (106.56 km/h) |
| 70 mph (112.65 km/h) | 71.3 mph (114.75 km/h) |
| 75 mph (120.7 km/h) | 76.4 mph (122.95 km/h) |
| 80 mph (128.75 km/h) | 81.49 mph (131.15 km/h) |
| 85 mph (136.79 km/h) | 86.58 mph (139.34 km/h) |
| 90 mph (144.84 km/h) | 91.68 mph (147.54 km/h) |
| 95 mph (152.89 km/h) | 96.77 mph (155.74 km/h) |
| 100 mph (160.93 km/h) | 101.86 mph (163.93 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1601 | 1860 | 2003 | 2092 | 2187 | 2255 | 2330 | 2419 | 2541 | 2664 | 2800 | 2909 | 3107 | 3325 | 3495 | 3604 | 3666 | 3890 | 4204 | 4885 |
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