Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 40/12.5-20 | 35/12.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 40.03 (1016.8) | 35.02 (889.6) | -5.01 (-127.2) -12.5% |
| Width inches (mm) | 12.52 (318) | 12.52 (318) | 0 (0) 0% |
| Circum. inches (mm) | 125.76 (3194.37) | 110.03 (2794.76) | -15.73 (-399.61) -12.5% |
| Sidewall Height inches (mm) | 10.02 (254.4) | 7.51 (190.8) | -2.5 (-63.6) -25% |
| Revolutions per mile (km) | 503.81 (313.05) | 575.84 (357.81) | 72.04 (44.76) 14.3% |
35/12.5-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.5 mph (28.16 km/h) |
| 25 mph (40.23 km/h) | 21.87 mph (35.2 km/h) |
| 30 mph (48.28 km/h) | 26.25 mph (42.24 km/h) |
| 35 mph (56.33 km/h) | 30.62 mph (49.28 km/h) |
| 40 mph (64.37 km/h) | 35 mph (56.32 km/h) |
| 45 mph (72.42 km/h) | 39.37 mph (63.36 km/h) |
| 50 mph (80.47 km/h) | 43.75 mph (70.4 km/h) |
| 55 mph (88.51 km/h) | 48.12 mph (77.44 km/h) |
| 60 mph (96.56 km/h) | 52.49 mph (84.48 km/h) |
| 65 mph (104.61 km/h) | 56.87 mph (91.52 km/h) |
| 70 mph (112.65 km/h) | 61.24 mph (98.56 km/h) |
| 75 mph (120.7 km/h) | 65.62 mph (105.6 km/h) |
| 80 mph (128.75 km/h) | 69.99 mph (112.64 km/h) |
| 85 mph (136.79 km/h) | 74.37 mph (119.68 km/h) |
| 90 mph (144.84 km/h) | 78.74 mph (126.72 km/h) |
| 95 mph (152.89 km/h) | 83.12 mph (133.76 km/h) |
| 100 mph (160.93 km/h) | 87.49 mph (140.8 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1465 | 1702 | 1833 | 1914 | 2002 | 2064 | 2133 | 2214 | 2326 | 2438 | 2563 | 2663 | 2844 | 3043 | 3199 | 3299 | 3355 | 3561 | 3847 | 4471 |
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