Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 40/12.5-20 | 275/70-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 40.03 (1016.8) | 35.16 (893) | -4.87 (-123.8) -12.2% |
| Width inches (mm) | 12.52 (318) | 10.83 (275) | -1.69 (-43) -13.5% |
| Circum. inches (mm) | 125.76 (3194.37) | 110.45 (2805.44) | -15.31 (-388.93) -12.2% |
| Sidewall Height inches (mm) | 10.02 (254.4) | 7.58 (192.5) | -2.44 (-61.9) -24.3% |
| Revolutions per mile (km) | 503.81 (313.05) | 573.65 (356.45) | 69.84 (43.4) 13.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.56 mph (28.27 km/h) |
| 25 mph (40.23 km/h) | 21.96 mph (35.34 km/h) |
| 30 mph (48.28 km/h) | 26.35 mph (42.4 km/h) |
| 35 mph (56.33 km/h) | 30.74 mph (49.47 km/h) |
| 40 mph (64.37 km/h) | 35.13 mph (56.54 km/h) |
| 45 mph (72.42 km/h) | 39.52 mph (63.6 km/h) |
| 50 mph (80.47 km/h) | 43.91 mph (70.67 km/h) |
| 55 mph (88.51 km/h) | 48.3 mph (77.74 km/h) |
| 60 mph (96.56 km/h) | 52.69 mph (84.8 km/h) |
| 65 mph (104.61 km/h) | 57.09 mph (91.87 km/h) |
| 70 mph (112.65 km/h) | 61.48 mph (98.94 km/h) |
| 75 mph (120.7 km/h) | 65.87 mph (106.01 km/h) |
| 80 mph (128.75 km/h) | 70.26 mph (113.07 km/h) |
| 85 mph (136.79 km/h) | 74.65 mph (120.14 km/h) |
| 90 mph (144.84 km/h) | 79.04 mph (127.21 km/h) |
| 95 mph (152.89 km/h) | 83.43 mph (134.27 km/h) |
| 100 mph (160.93 km/h) | 87.82 mph (141.34 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1460 | 1696 | 1826 | 1907 | 1994 | 2056 | 2125 | 2205 | 2317 | 2429 | 2553 | 2653 | 2833 | 3031 | 3187 | 3286 | 3342 | 3547 | 3833 | 4454 |
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