Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/70-18 | 255/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.16 (842.2) | 32.06 (814.2) | -1.1 (-28) -3.3% |
| Width inches (mm) | 10.83 (275) | 10.04 (255) | -0.79 (-20) -7.3% |
| Circum. inches (mm) | 104.17 (2645.85) | 100.7 (2557.88) | -3.46 (-87.96) -3.3% |
| Sidewall Height inches (mm) | 7.58 (192.5) | 7.03 (178.5) | -0.55 (-14) -7.3% |
| Revolutions per mile (km) | 608.25 (377.95) | 629.17 (390.95) | 20.92 (13) 3.4% |
255/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.34 mph (31.12 km/h) |
| 25 mph (40.23 km/h) | 24.17 mph (38.9 km/h) |
| 30 mph (48.28 km/h) | 29 mph (46.68 km/h) |
| 35 mph (56.33 km/h) | 33.84 mph (54.45 km/h) |
| 40 mph (64.37 km/h) | 38.67 mph (62.23 km/h) |
| 45 mph (72.42 km/h) | 43.5 mph (70.01 km/h) |
| 50 mph (80.47 km/h) | 48.34 mph (77.79 km/h) |
| 55 mph (88.51 km/h) | 53.17 mph (85.57 km/h) |
| 60 mph (96.56 km/h) | 58.01 mph (93.35 km/h) |
| 65 mph (104.61 km/h) | 62.84 mph (101.13 km/h) |
| 70 mph (112.65 km/h) | 67.67 mph (108.91 km/h) |
| 75 mph (120.7 km/h) | 72.51 mph (116.69 km/h) |
| 80 mph (128.75 km/h) | 77.34 mph (124.47 km/h) |
| 85 mph (136.79 km/h) | 82.17 mph (132.25 km/h) |
| 90 mph (144.84 km/h) | 87.01 mph (140.03 km/h) |
| 95 mph (152.89 km/h) | 91.84 mph (147.81 km/h) |
| 100 mph (160.93 km/h) | 96.68 mph (155.58 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1601 | 1860 | 2003 | 2092 | 2187 | 2255 | 2330 | 2419 | 2541 | 2664 | 2800 | 2909 | 3107 | 3325 | 3495 | 3604 | 3666 | 3890 | 4204 | 4885 |
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