Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/80-20 | 33/12.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.32 (948) | 33.02 (838.72) | -4.3 (-109.28) -11.5% |
| Width inches (mm) | 10.83 (275) | 12.52 (318) | 1.69 (43) 15.6% |
| Circum. inches (mm) | 117.25 (2978.23) | 103.74 (2634.92) | -13.52 (-343.31) -11.5% |
| Sidewall Height inches (mm) | 8.66 (220) | 6.51 (165.36) | -2.15 (-54.64) -24.8% |
| Revolutions per mile (km) | 540.37 (335.77) | 610.78 (379.52) | 70.41 (43.75) 13% |
33/12.5-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.69 mph (28.48 km/h) |
| 25 mph (40.23 km/h) | 22.12 mph (35.6 km/h) |
| 30 mph (48.28 km/h) | 26.54 mph (42.71 km/h) |
| 35 mph (56.33 km/h) | 30.97 mph (49.83 km/h) |
| 40 mph (64.37 km/h) | 35.39 mph (56.95 km/h) |
| 45 mph (72.42 km/h) | 39.81 mph (64.07 km/h) |
| 50 mph (80.47 km/h) | 44.24 mph (71.19 km/h) |
| 55 mph (88.51 km/h) | 48.66 mph (78.31 km/h) |
| 60 mph (96.56 km/h) | 53.08 mph (85.43 km/h) |
| 65 mph (104.61 km/h) | 57.51 mph (92.55 km/h) |
| 70 mph (112.65 km/h) | 61.93 mph (99.67 km/h) |
| 75 mph (120.7 km/h) | 66.35 mph (106.79 km/h) |
| 80 mph (128.75 km/h) | 70.78 mph (113.91 km/h) |
| 85 mph (136.79 km/h) | 75.2 mph (121.03 km/h) |
| 90 mph (144.84 km/h) | 79.63 mph (128.14 km/h) |
| 95 mph (152.89 km/h) | 84.05 mph (135.26 km/h) |
| 100 mph (160.93 km/h) | 88.47 mph (142.38 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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