Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/75-17 | 275/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.47 (799.3) | 33.16 (842.2) | 1.69 (42.9) 5.4% |
| Width inches (mm) | 9.65 (245) | 10.83 (275) | 1.18 (30) 12.2% |
| Circum. inches (mm) | 98.86 (2511.08) | 104.17 (2645.85) | 5.31 (134.77) 5.4% |
| Sidewall Height inches (mm) | 7.23 (183.75) | 7.58 (192.5) | 0.34 (8.75) 4.8% |
| Revolutions per mile (km) | 640.9 (398.24) | 608.25 (377.95) | -32.65 (-20.29) -5.1% |
275/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.07 mph (33.91 km/h) |
| 25 mph (40.23 km/h) | 26.34 mph (42.39 km/h) |
| 30 mph (48.28 km/h) | 31.61 mph (50.87 km/h) |
| 35 mph (56.33 km/h) | 36.88 mph (59.35 km/h) |
| 40 mph (64.37 km/h) | 42.15 mph (67.83 km/h) |
| 45 mph (72.42 km/h) | 47.42 mph (76.31 km/h) |
| 50 mph (80.47 km/h) | 52.68 mph (84.79 km/h) |
| 55 mph (88.51 km/h) | 57.95 mph (93.26 km/h) |
| 60 mph (96.56 km/h) | 63.22 mph (101.74 km/h) |
| 65 mph (104.61 km/h) | 68.49 mph (110.22 km/h) |
| 70 mph (112.65 km/h) | 73.76 mph (118.7 km/h) |
| 75 mph (120.7 km/h) | 79.03 mph (127.18 km/h) |
| 80 mph (128.75 km/h) | 84.29 mph (135.66 km/h) |
| 85 mph (136.79 km/h) | 89.56 mph (144.14 km/h) |
| 90 mph (144.84 km/h) | 94.83 mph (152.62 km/h) |
| 95 mph (152.89 km/h) | 100.1 mph (161.09 km/h) |
| 100 mph (160.93 km/h) | 105.37 mph (169.57 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1548 | 1798 | 1937 | 2022 | 2114 | 2180 | 2253 | 2338 | 2457 | 2575 | 2707 | 2813 | 3004 | 3214 | 3379 | 3484 | 3544 | 3761 | 4064 | 4723 |
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