Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/65-20 | 33/12.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.07 (865.5) | 33.02 (838.72) | -1.05 (-26.78) -3.1% |
| Width inches (mm) | 10.83 (275) | 12.52 (318) | 1.69 (43) 15.6% |
| Circum. inches (mm) | 107.05 (2719.05) | 103.74 (2634.92) | -3.31 (-84.13) -3.1% |
| Sidewall Height inches (mm) | 7.04 (178.75) | 6.51 (165.36) | -0.53 (-13.39) -7.5% |
| Revolutions per mile (km) | 591.88 (367.78) | 610.78 (379.52) | 18.9 (11.74) 3.2% |
33/12.5-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.38 mph (31.19 km/h) |
| 25 mph (40.23 km/h) | 24.23 mph (38.99 km/h) |
| 30 mph (48.28 km/h) | 29.07 mph (46.79 km/h) |
| 35 mph (56.33 km/h) | 33.92 mph (54.58 km/h) |
| 40 mph (64.37 km/h) | 38.76 mph (62.38 km/h) |
| 45 mph (72.42 km/h) | 43.61 mph (70.18 km/h) |
| 50 mph (80.47 km/h) | 48.45 mph (77.98 km/h) |
| 55 mph (88.51 km/h) | 53.3 mph (85.78 km/h) |
| 60 mph (96.56 km/h) | 58.14 mph (93.57 km/h) |
| 65 mph (104.61 km/h) | 62.99 mph (101.37 km/h) |
| 70 mph (112.65 km/h) | 67.83 mph (109.17 km/h) |
| 75 mph (120.7 km/h) | 72.68 mph (116.97 km/h) |
| 80 mph (128.75 km/h) | 77.52 mph (124.76 km/h) |
| 85 mph (136.79 km/h) | 82.37 mph (132.56 km/h) |
| 90 mph (144.84 km/h) | 87.22 mph (140.36 km/h) |
| 95 mph (152.89 km/h) | 92.06 mph (148.16 km/h) |
| 100 mph (160.93 km/h) | 96.91 mph (155.96 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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