Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/65-20 | 33/12.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.05 (839.5) | 33.02 (838.72) | -0.03 (-0.78) -0.1% |
| Width inches (mm) | 10.04 (255) | 12.52 (318) | 2.48 (63) 24.7% |
| Circum. inches (mm) | 103.83 (2637.37) | 103.74 (2634.92) | -0.1 (-2.45) -0.1% |
| Sidewall Height inches (mm) | 6.53 (165.75) | 6.51 (165.36) | -0.02 (-0.39) -0.2% |
| Revolutions per mile (km) | 610.21 (379.17) | 610.78 (379.52) | 0.57 (0.35) 0.1% |
33/12.5-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.98 mph (32.16 km/h) |
| 25 mph (40.23 km/h) | 24.98 mph (40.2 km/h) |
| 30 mph (48.28 km/h) | 29.97 mph (48.24 km/h) |
| 35 mph (56.33 km/h) | 34.97 mph (56.27 km/h) |
| 40 mph (64.37 km/h) | 39.96 mph (64.31 km/h) |
| 45 mph (72.42 km/h) | 44.96 mph (72.35 km/h) |
| 50 mph (80.47 km/h) | 49.95 mph (80.39 km/h) |
| 55 mph (88.51 km/h) | 54.95 mph (88.43 km/h) |
| 60 mph (96.56 km/h) | 59.94 mph (96.47 km/h) |
| 65 mph (104.61 km/h) | 64.94 mph (104.51 km/h) |
| 70 mph (112.65 km/h) | 69.93 mph (112.55 km/h) |
| 75 mph (120.7 km/h) | 74.93 mph (120.59 km/h) |
| 80 mph (128.75 km/h) | 79.93 mph (128.63 km/h) |
| 85 mph (136.79 km/h) | 84.92 mph (136.67 km/h) |
| 90 mph (144.84 km/h) | 89.92 mph (144.71 km/h) |
| 95 mph (152.89 km/h) | 94.91 mph (152.75 km/h) |
| 100 mph (160.93 km/h) | 99.91 mph (160.79 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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