Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/80-18 | 255/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.06 (865.2) | 32.06 (814.2) | -2.01 (-51) -5.9% |
| Width inches (mm) | 10.04 (255) | 10.04 (255) | 0 (0) 0% |
| Circum. inches (mm) | 107.01 (2718.11) | 100.7 (2557.88) | -6.31 (-160.22) -5.9% |
| Sidewall Height inches (mm) | 8.03 (204) | 7.03 (178.5) | -1 (-25.5) -12.5% |
| Revolutions per mile (km) | 592.08 (367.9) | 629.17 (390.95) | 37.09 (23.04) 6.3% |
255/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.82 mph (30.29 km/h) |
| 25 mph (40.23 km/h) | 23.53 mph (37.86 km/h) |
| 30 mph (48.28 km/h) | 28.23 mph (45.43 km/h) |
| 35 mph (56.33 km/h) | 32.94 mph (53.01 km/h) |
| 40 mph (64.37 km/h) | 37.64 mph (60.58 km/h) |
| 45 mph (72.42 km/h) | 42.35 mph (68.15 km/h) |
| 50 mph (80.47 km/h) | 47.05 mph (75.72 km/h) |
| 55 mph (88.51 km/h) | 51.76 mph (83.3 km/h) |
| 60 mph (96.56 km/h) | 56.46 mph (90.87 km/h) |
| 65 mph (104.61 km/h) | 61.17 mph (98.44 km/h) |
| 70 mph (112.65 km/h) | 65.87 mph (106.01 km/h) |
| 75 mph (120.7 km/h) | 70.58 mph (113.59 km/h) |
| 80 mph (128.75 km/h) | 75.28 mph (121.16 km/h) |
| 85 mph (136.79 km/h) | 79.99 mph (128.73 km/h) |
| 90 mph (144.84 km/h) | 84.69 mph (136.3 km/h) |
| 95 mph (152.89 km/h) | 89.4 mph (143.88 km/h) |
| 100 mph (160.93 km/h) | 94.11 mph (151.45 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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