Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/60-20 | 33/12.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.99 (838) | 33.02 (838.72) | 0.03 (0.72) 0.1% |
| Width inches (mm) | 10.83 (275) | 12.52 (318) | 1.69 (43) 15.6% |
| Circum. inches (mm) | 103.65 (2632.65) | 103.74 (2634.92) | 0.09 (2.26) 0.1% |
| Sidewall Height inches (mm) | 6.5 (165) | 6.51 (165.36) | 0.01 (0.36) 0.2% |
| Revolutions per mile (km) | 611.3 (379.84) | 610.78 (379.52) | -0.52 (-0.33) -0.1% |
33/12.5-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.02 mph (32.21 km/h) |
| 25 mph (40.23 km/h) | 25.02 mph (40.27 km/h) |
| 30 mph (48.28 km/h) | 30.03 mph (48.32 km/h) |
| 35 mph (56.33 km/h) | 35.03 mph (56.38 km/h) |
| 40 mph (64.37 km/h) | 40.03 mph (64.43 km/h) |
| 45 mph (72.42 km/h) | 45.04 mph (72.48 km/h) |
| 50 mph (80.47 km/h) | 50.04 mph (80.54 km/h) |
| 55 mph (88.51 km/h) | 55.05 mph (88.59 km/h) |
| 60 mph (96.56 km/h) | 60.05 mph (96.64 km/h) |
| 65 mph (104.61 km/h) | 65.06 mph (104.7 km/h) |
| 70 mph (112.65 km/h) | 70.06 mph (112.75 km/h) |
| 75 mph (120.7 km/h) | 75.06 mph (120.8 km/h) |
| 80 mph (128.75 km/h) | 80.07 mph (128.86 km/h) |
| 85 mph (136.79 km/h) | 85.07 mph (136.91 km/h) |
| 90 mph (144.84 km/h) | 90.08 mph (144.97 km/h) |
| 95 mph (152.89 km/h) | 95.08 mph (153.02 km/h) |
| 100 mph (160.93 km/h) | 100.09 mph (161.07 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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