Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 38/15.5-20 | 345/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.99 (965.04) | 36.3 (922) | -1.69 (-43.04) -4.5% |
| Width inches (mm) | 15.51 (394) | 13.58 (345) | -1.93 (-49) -12.4% |
| Circum. inches (mm) | 119.36 (3031.76) | 114.04 (2896.55) | -5.32 (-135.21) -4.5% |
| Sidewall Height inches (mm) | 9 (228.52) | 8.15 (207) | -0.85 (-21.52) -9.4% |
| Revolutions per mile (km) | 530.83 (329.84) | 555.61 (345.24) | 24.78 (15.4) 4.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.11 mph (30.75 km/h) |
| 25 mph (40.23 km/h) | 23.89 mph (38.44 km/h) |
| 30 mph (48.28 km/h) | 28.66 mph (46.13 km/h) |
| 35 mph (56.33 km/h) | 33.44 mph (53.82 km/h) |
| 40 mph (64.37 km/h) | 38.22 mph (61.5 km/h) |
| 45 mph (72.42 km/h) | 42.99 mph (69.19 km/h) |
| 50 mph (80.47 km/h) | 47.77 mph (76.88 km/h) |
| 55 mph (88.51 km/h) | 52.55 mph (84.57 km/h) |
| 60 mph (96.56 km/h) | 57.32 mph (92.25 km/h) |
| 65 mph (104.61 km/h) | 62.1 mph (99.94 km/h) |
| 70 mph (112.65 km/h) | 66.88 mph (107.63 km/h) |
| 75 mph (120.7 km/h) | 71.66 mph (115.32 km/h) |
| 80 mph (128.75 km/h) | 76.43 mph (123.01 km/h) |
| 85 mph (136.79 km/h) | 81.21 mph (130.69 km/h) |
| 90 mph (144.84 km/h) | 85.99 mph (138.38 km/h) |
| 95 mph (152.89 km/h) | 90.76 mph (146.07 km/h) |
| 100 mph (160.93 km/h) | 95.54 mph (153.76 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1414 | 1643 | 1769 | 1847 | 1931 | 1992 | 2058 | 2136 | 2244 | 2353 | 2473 | 2569 | 2744 | 2936 | 3087 | 3183 | 3237 | 3436 | 3712 | 4314 |
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