Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/60-18 | 255/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.57 (751.2) | 32.06 (814.2) | 2.48 (63) 8.4% |
| Width inches (mm) | 9.65 (245) | 10.04 (255) | 0.39 (10) 4.1% |
| Circum. inches (mm) | 92.91 (2359.96) | 100.7 (2557.88) | 7.79 (197.92) 8.4% |
| Sidewall Height inches (mm) | 5.79 (147) | 7.03 (178.5) | 1.24 (31.5) 21.4% |
| Revolutions per mile (km) | 681.94 (423.73) | 629.17 (390.95) | -52.77 (-32.79) -7.7% |
255/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.68 mph (34.89 km/h) |
| 25 mph (40.23 km/h) | 27.1 mph (43.61 km/h) |
| 30 mph (48.28 km/h) | 32.52 mph (52.33 km/h) |
| 35 mph (56.33 km/h) | 37.94 mph (61.05 km/h) |
| 40 mph (64.37 km/h) | 43.35 mph (69.77 km/h) |
| 45 mph (72.42 km/h) | 48.77 mph (78.49 km/h) |
| 50 mph (80.47 km/h) | 54.19 mph (87.22 km/h) |
| 55 mph (88.51 km/h) | 59.61 mph (95.94 km/h) |
| 60 mph (96.56 km/h) | 65.03 mph (104.66 km/h) |
| 65 mph (104.61 km/h) | 70.45 mph (113.38 km/h) |
| 70 mph (112.65 km/h) | 75.87 mph (122.1 km/h) |
| 75 mph (120.7 km/h) | 81.29 mph (130.82 km/h) |
| 80 mph (128.75 km/h) | 86.71 mph (139.55 km/h) |
| 85 mph (136.79 km/h) | 92.13 mph (148.27 km/h) |
| 90 mph (144.84 km/h) | 97.55 mph (156.99 km/h) |
| 95 mph (152.89 km/h) | 102.97 mph (165.71 km/h) |
| 100 mph (160.93 km/h) | 108.39 mph (174.43 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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