Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/70-17 | 255/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.06 (788.8) | 32.06 (814.2) | 1 (25.4) 3.2% |
| Width inches (mm) | 10.04 (255) | 10.04 (255) | 0 (0) 0% |
| Circum. inches (mm) | 97.56 (2478.09) | 100.7 (2557.88) | 3.14 (79.8) 3.2% |
| Sidewall Height inches (mm) | 7.03 (178.5) | 7.03 (178.5) | 0 (0) 0% |
| Revolutions per mile (km) | 649.43 (403.54) | 629.17 (390.95) | -20.26 (-12.59) -3.1% |
255/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.64 mph (33.22 km/h) |
| 25 mph (40.23 km/h) | 25.81 mph (41.53 km/h) |
| 30 mph (48.28 km/h) | 30.97 mph (49.84 km/h) |
| 35 mph (56.33 km/h) | 36.13 mph (58.14 km/h) |
| 40 mph (64.37 km/h) | 41.29 mph (66.45 km/h) |
| 45 mph (72.42 km/h) | 46.45 mph (74.75 km/h) |
| 50 mph (80.47 km/h) | 51.61 mph (83.06 km/h) |
| 55 mph (88.51 km/h) | 56.77 mph (91.36 km/h) |
| 60 mph (96.56 km/h) | 61.93 mph (99.67 km/h) |
| 65 mph (104.61 km/h) | 67.09 mph (107.98 km/h) |
| 70 mph (112.65 km/h) | 72.25 mph (116.28 km/h) |
| 75 mph (120.7 km/h) | 77.42 mph (124.59 km/h) |
| 80 mph (128.75 km/h) | 82.58 mph (132.89 km/h) |
| 85 mph (136.79 km/h) | 87.74 mph (141.2 km/h) |
| 90 mph (144.84 km/h) | 92.9 mph (149.51 km/h) |
| 95 mph (152.89 km/h) | 98.06 mph (157.81 km/h) |
| 100 mph (160.93 km/h) | 103.22 mph (166.12 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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