Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 365/65-16 | 38/13.5-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.68 (880.9) | 37.99 (964.84) | 3.3 (83.94) 9.5% |
| Width inches (mm) | 14.37 (365) | 13.5 (343) | -0.87 (-22) -6% |
| Circum. inches (mm) | 108.95 (2767.43) | 119.34 (3031.13) | 10.38 (263.71) 9.5% |
| Sidewall Height inches (mm) | 9.34 (237.25) | 9.99 (253.82) | 0.65 (16.57) 7% |
| Revolutions per mile (km) | 581.53 (361.35) | 530.94 (329.91) | -50.59 (-31.44) -8.7% |
38/13.5-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.91 mph (35.25 km/h) |
| 25 mph (40.23 km/h) | 27.38 mph (44.07 km/h) |
| 30 mph (48.28 km/h) | 32.86 mph (52.88 km/h) |
| 35 mph (56.33 km/h) | 38.34 mph (61.69 km/h) |
| 40 mph (64.37 km/h) | 43.81 mph (70.51 km/h) |
| 45 mph (72.42 km/h) | 49.29 mph (79.32 km/h) |
| 50 mph (80.47 km/h) | 54.76 mph (88.14 km/h) |
| 55 mph (88.51 km/h) | 60.24 mph (96.95 km/h) |
| 60 mph (96.56 km/h) | 65.72 mph (105.76 km/h) |
| 65 mph (104.61 km/h) | 71.19 mph (114.58 km/h) |
| 70 mph (112.65 km/h) | 76.67 mph (123.39 km/h) |
| 75 mph (120.7 km/h) | 82.15 mph (132.2 km/h) |
| 80 mph (128.75 km/h) | 87.62 mph (141.02 km/h) |
| 85 mph (136.79 km/h) | 93.1 mph (149.83 km/h) |
| 90 mph (144.84 km/h) | 98.58 mph (158.64 km/h) |
| 95 mph (152.89 km/h) | 104.05 mph (167.46 km/h) |
| 100 mph (160.93 km/h) | 109.53 mph (176.27 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1351 | 1570 | 1690 | 1765 | 1846 | 1903 | 1966 | 2041 | 2145 | 2248 | 2363 | 2455 | 2622 | 2806 | 2950 | 3041 | 3093 | 3283 | 3547 | 4122 |
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