Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/60-20 | 33/12.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.88 (886) | 33.02 (838.72) | -1.86 (-47.28) -5.3% |
| Width inches (mm) | 12.4 (315) | 12.52 (318) | 0.12 (3) 1% |
| Circum. inches (mm) | 109.58 (2783.45) | 103.74 (2634.92) | -5.85 (-148.53) -5.3% |
| Sidewall Height inches (mm) | 7.44 (189) | 6.51 (165.36) | -0.93 (-23.64) -12.5% |
| Revolutions per mile (km) | 578.18 (359.27) | 610.78 (379.52) | 32.59 (20.25) 5.6% |
33/12.5-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.93 mph (30.47 km/h) |
| 25 mph (40.23 km/h) | 23.67 mph (38.09 km/h) |
| 30 mph (48.28 km/h) | 28.4 mph (45.7 km/h) |
| 35 mph (56.33 km/h) | 33.13 mph (53.32 km/h) |
| 40 mph (64.37 km/h) | 37.87 mph (60.94 km/h) |
| 45 mph (72.42 km/h) | 42.6 mph (68.56 km/h) |
| 50 mph (80.47 km/h) | 47.33 mph (76.17 km/h) |
| 55 mph (88.51 km/h) | 52.07 mph (83.79 km/h) |
| 60 mph (96.56 km/h) | 56.8 mph (91.41 km/h) |
| 65 mph (104.61 km/h) | 61.53 mph (99.03 km/h) |
| 70 mph (112.65 km/h) | 66.26 mph (106.64 km/h) |
| 75 mph (120.7 km/h) | 71 mph (114.26 km/h) |
| 80 mph (128.75 km/h) | 75.73 mph (121.88 km/h) |
| 85 mph (136.79 km/h) | 80.46 mph (129.49 km/h) |
| 90 mph (144.84 km/h) | 85.2 mph (137.11 km/h) |
| 95 mph (152.89 km/h) | 89.93 mph (144.73 km/h) |
| 100 mph (160.93 km/h) | 94.66 mph (152.35 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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