Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 37/12.5-18 | 365/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.03 (940.56) | 36.68 (931.7) | -0.35 (-8.86) -0.9% |
| Width inches (mm) | 12.52 (318) | 14.37 (365) | 1.85 (47) 14.8% |
| Circum. inches (mm) | 116.33 (2954.86) | 115.24 (2927.02) | -1.1 (-27.83) -0.9% |
| Sidewall Height inches (mm) | 9.51 (241.68) | 9.34 (237.25) | -0.17 (-4.43) -1.8% |
| Revolutions per mile (km) | 544.64 (338.43) | 549.82 (341.64) | 5.18 (3.22) 1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.81 mph (31.88 km/h) |
| 25 mph (40.23 km/h) | 24.76 mph (39.85 km/h) |
| 30 mph (48.28 km/h) | 29.72 mph (47.83 km/h) |
| 35 mph (56.33 km/h) | 34.67 mph (55.8 km/h) |
| 40 mph (64.37 km/h) | 39.62 mph (63.77 km/h) |
| 45 mph (72.42 km/h) | 44.58 mph (71.74 km/h) |
| 50 mph (80.47 km/h) | 49.53 mph (79.71 km/h) |
| 55 mph (88.51 km/h) | 54.48 mph (87.68 km/h) |
| 60 mph (96.56 km/h) | 59.43 mph (95.65 km/h) |
| 65 mph (104.61 km/h) | 64.39 mph (103.62 km/h) |
| 70 mph (112.65 km/h) | 69.34 mph (111.59 km/h) |
| 75 mph (120.7 km/h) | 74.29 mph (119.56 km/h) |
| 80 mph (128.75 km/h) | 79.25 mph (127.53 km/h) |
| 85 mph (136.79 km/h) | 84.2 mph (135.51 km/h) |
| 90 mph (144.84 km/h) | 89.15 mph (143.48 km/h) |
| 95 mph (152.89 km/h) | 94.11 mph (151.45 km/h) |
| 100 mph (160.93 km/h) | 99.06 mph (159.42 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1399 | 1625 | 1750 | 1828 | 1911 | 1971 | 2036 | 2114 | 2221 | 2328 | 2447 | 2542 | 2715 | 2906 | 3054 | 3150 | 3203 | 3400 | 3674 | 4269 |
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