Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/60-18 | 255/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.05 (763.2) | 32.06 (814.2) | 2.01 (51) 6.7% |
| Width inches (mm) | 10.04 (255) | 10.04 (255) | 0 (0) 0% |
| Circum. inches (mm) | 94.4 (2397.66) | 100.7 (2557.88) | 6.31 (160.22) 6.7% |
| Sidewall Height inches (mm) | 6.02 (153) | 7.03 (178.5) | 1 (25.5) 16.7% |
| Revolutions per mile (km) | 671.21 (417.07) | 629.17 (390.95) | -42.04 (-26.12) -6.3% |
255/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.34 mph (34.34 km/h) |
| 25 mph (40.23 km/h) | 26.67 mph (42.92 km/h) |
| 30 mph (48.28 km/h) | 32 mph (51.51 km/h) |
| 35 mph (56.33 km/h) | 37.34 mph (60.09 km/h) |
| 40 mph (64.37 km/h) | 42.67 mph (68.68 km/h) |
| 45 mph (72.42 km/h) | 48.01 mph (77.26 km/h) |
| 50 mph (80.47 km/h) | 53.34 mph (85.84 km/h) |
| 55 mph (88.51 km/h) | 58.68 mph (94.43 km/h) |
| 60 mph (96.56 km/h) | 64.01 mph (103.01 km/h) |
| 65 mph (104.61 km/h) | 69.34 mph (111.6 km/h) |
| 70 mph (112.65 km/h) | 74.68 mph (120.18 km/h) |
| 75 mph (120.7 km/h) | 80.01 mph (128.77 km/h) |
| 80 mph (128.75 km/h) | 85.35 mph (137.35 km/h) |
| 85 mph (136.79 km/h) | 90.68 mph (145.94 km/h) |
| 90 mph (144.84 km/h) | 96.01 mph (154.52 km/h) |
| 95 mph (152.89 km/h) | 101.35 mph (163.1 km/h) |
| 100 mph (160.93 km/h) | 106.68 mph (171.69 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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