Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/70-20 | 33/12.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 35.16 (893) | 33.02 (838.72) | -2.14 (-54.28) -6.1% |
| Width inches (mm) | 10.83 (275) | 12.52 (318) | 1.69 (43) 15.6% |
| Circum. inches (mm) | 110.45 (2805.44) | 103.74 (2634.92) | -6.71 (-170.53) -6.1% |
| Sidewall Height inches (mm) | 7.58 (192.5) | 6.51 (165.36) | -1.07 (-27.14) -14.1% |
| Revolutions per mile (km) | 573.65 (356.45) | 610.78 (379.52) | 37.13 (23.07) 6.5% |
33/12.5-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.78 mph (30.23 km/h) |
| 25 mph (40.23 km/h) | 23.48 mph (37.79 km/h) |
| 30 mph (48.28 km/h) | 28.18 mph (45.35 km/h) |
| 35 mph (56.33 km/h) | 32.87 mph (52.9 km/h) |
| 40 mph (64.37 km/h) | 37.57 mph (60.46 km/h) |
| 45 mph (72.42 km/h) | 42.26 mph (68.02 km/h) |
| 50 mph (80.47 km/h) | 46.96 mph (75.58 km/h) |
| 55 mph (88.51 km/h) | 51.66 mph (83.13 km/h) |
| 60 mph (96.56 km/h) | 56.35 mph (90.69 km/h) |
| 65 mph (104.61 km/h) | 61.05 mph (98.25 km/h) |
| 70 mph (112.65 km/h) | 65.75 mph (105.81 km/h) |
| 75 mph (120.7 km/h) | 70.44 mph (113.36 km/h) |
| 80 mph (128.75 km/h) | 75.14 mph (120.92 km/h) |
| 85 mph (136.79 km/h) | 79.83 mph (128.48 km/h) |
| 90 mph (144.84 km/h) | 84.53 mph (136.04 km/h) |
| 95 mph (152.89 km/h) | 89.23 mph (143.59 km/h) |
| 100 mph (160.93 km/h) | 93.92 mph (151.15 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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