Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/55-18 | 255/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.04 (737.7) | 32.06 (814.2) | 3.01 (76.5) 10.4% |
| Width inches (mm) | 10.04 (255) | 10.04 (255) | 0 (0) 0% |
| Circum. inches (mm) | 91.24 (2317.55) | 100.7 (2557.88) | 9.46 (240.33) 10.4% |
| Sidewall Height inches (mm) | 5.52 (140.25) | 7.03 (178.5) | 1.51 (38.25) 27.3% |
| Revolutions per mile (km) | 694.42 (431.49) | 629.17 (390.95) | -65.25 (-40.54) -9.4% |
255/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.07 mph (35.52 km/h) |
| 25 mph (40.23 km/h) | 27.59 mph (44.41 km/h) |
| 30 mph (48.28 km/h) | 33.11 mph (53.29 km/h) |
| 35 mph (56.33 km/h) | 38.63 mph (62.17 km/h) |
| 40 mph (64.37 km/h) | 44.15 mph (71.05 km/h) |
| 45 mph (72.42 km/h) | 49.67 mph (79.93 km/h) |
| 50 mph (80.47 km/h) | 55.19 mph (88.81 km/h) |
| 55 mph (88.51 km/h) | 60.7 mph (97.69 km/h) |
| 60 mph (96.56 km/h) | 66.22 mph (106.57 km/h) |
| 65 mph (104.61 km/h) | 71.74 mph (115.46 km/h) |
| 70 mph (112.65 km/h) | 77.26 mph (124.34 km/h) |
| 75 mph (120.7 km/h) | 82.78 mph (133.22 km/h) |
| 80 mph (128.75 km/h) | 88.3 mph (142.1 km/h) |
| 85 mph (136.79 km/h) | 93.81 mph (150.98 km/h) |
| 90 mph (144.84 km/h) | 99.33 mph (159.86 km/h) |
| 95 mph (152.89 km/h) | 104.85 mph (168.74 km/h) |
| 100 mph (160.93 km/h) | 110.37 mph (177.62 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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