Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 40/12.5-20 | 33/12.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 40.03 (1016.8) | 33.02 (838.72) | -7.01 (-178.08) -17.5% |
| Width inches (mm) | 12.52 (318) | 12.52 (318) | 0 (0) 0% |
| Circum. inches (mm) | 125.76 (3194.37) | 103.74 (2634.92) | -22.03 (-559.45) -17.5% |
| Sidewall Height inches (mm) | 10.02 (254.4) | 6.51 (165.36) | -3.51 (-89.04) -35% |
| Revolutions per mile (km) | 503.81 (313.05) | 610.78 (379.52) | 106.97 (66.47) 21.2% |
33/12.5-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 16.5 mph (26.55 km/h) |
| 25 mph (40.23 km/h) | 20.62 mph (33.19 km/h) |
| 30 mph (48.28 km/h) | 24.75 mph (39.82 km/h) |
| 35 mph (56.33 km/h) | 28.87 mph (46.46 km/h) |
| 40 mph (64.37 km/h) | 32.99 mph (53.1 km/h) |
| 45 mph (72.42 km/h) | 37.12 mph (59.74 km/h) |
| 50 mph (80.47 km/h) | 41.24 mph (66.37 km/h) |
| 55 mph (88.51 km/h) | 45.37 mph (73.01 km/h) |
| 60 mph (96.56 km/h) | 49.49 mph (79.65 km/h) |
| 65 mph (104.61 km/h) | 53.62 mph (86.29 km/h) |
| 70 mph (112.65 km/h) | 57.74 mph (92.92 km/h) |
| 75 mph (120.7 km/h) | 61.86 mph (99.56 km/h) |
| 80 mph (128.75 km/h) | 65.99 mph (106.2 km/h) |
| 85 mph (136.79 km/h) | 70.11 mph (112.84 km/h) |
| 90 mph (144.84 km/h) | 74.24 mph (119.47 km/h) |
| 95 mph (152.89 km/h) | 78.36 mph (126.11 km/h) |
| 100 mph (160.93 km/h) | 82.49 mph (132.75 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1554 | 1806 | 1945 | 2031 | 2123 | 2189 | 2262 | 2348 | 2467 | 2586 | 2718 | 2824 | 3016 | 3228 | 3393 | 3499 | 3558 | 3777 | 4081 | 4742 |
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