Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 245/75-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 31.47 (799.3) | 1.07 (27.1) 3.5% |
| Width inches (mm) | 6.89 (175) | 9.65 (245) | 2.76 (70) 40% |
| Circum. inches (mm) | 95.51 (2425.94) | 98.86 (2511.08) | 3.35 (85.14) 3.5% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 7.23 (183.75) | 1.03 (26.25) 16.7% |
| Revolutions per mile (km) | 663.39 (412.21) | 640.9 (398.24) | -22.49 (-13.98) -3.4% |
245/75-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.7 mph (33.32 km/h) |
| 25 mph (40.23 km/h) | 25.88 mph (41.65 km/h) |
| 30 mph (48.28 km/h) | 31.05 mph (49.97 km/h) |
| 35 mph (56.33 km/h) | 36.23 mph (58.3 km/h) |
| 40 mph (64.37 km/h) | 41.4 mph (66.63 km/h) |
| 45 mph (72.42 km/h) | 46.58 mph (74.96 km/h) |
| 50 mph (80.47 km/h) | 51.75 mph (83.29 km/h) |
| 55 mph (88.51 km/h) | 56.93 mph (91.62 km/h) |
| 60 mph (96.56 km/h) | 62.11 mph (99.95 km/h) |
| 65 mph (104.61 km/h) | 67.28 mph (108.28 km/h) |
| 70 mph (112.65 km/h) | 72.46 mph (116.61 km/h) |
| 75 mph (120.7 km/h) | 77.63 mph (124.94 km/h) |
| 80 mph (128.75 km/h) | 82.81 mph (133.27 km/h) |
| 85 mph (136.79 km/h) | 87.98 mph (141.6 km/h) |
| 90 mph (144.84 km/h) | 93.16 mph (149.92 km/h) |
| 95 mph (152.89 km/h) | 98.33 mph (158.25 km/h) |
| 100 mph (160.93 km/h) | 103.51 mph (166.58 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1631 | 1895 | 2040 | 2131 | 2228 | 2297 | 2374 | 2464 | 2589 | 2714 | 2852 | 2963 | 3165 | 3387 | 3560 | 3671 | 3734 | 3963 | 4282 | 4976 |
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