Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/75-18 | 33/12.5-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.24 (869.7) | 33.02 (838.8) | -1.22 (-30.9) -3.6% |
| Width inches (mm) | 10.83 (275) | 12.52 (318) | 1.69 (43) 15.6% |
| Circum. inches (mm) | 107.57 (2732.24) | 103.75 (2635.17) | -3.82 (-97.08) -3.6% |
| Sidewall Height inches (mm) | 8.12 (206.25) | 7.51 (190.8) | -0.61 (-15.45) -7.5% |
| Revolutions per mile (km) | 589.02 (366) | 610.72 (379.48) | 21.7 (13.48) 3.7% |
33/12.5-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.29 mph (31.04 km/h) |
| 25 mph (40.23 km/h) | 24.11 mph (38.8 km/h) |
| 30 mph (48.28 km/h) | 28.93 mph (46.57 km/h) |
| 35 mph (56.33 km/h) | 33.76 mph (54.33 km/h) |
| 40 mph (64.37 km/h) | 38.58 mph (62.09 km/h) |
| 45 mph (72.42 km/h) | 43.4 mph (69.85 km/h) |
| 50 mph (80.47 km/h) | 48.22 mph (77.61 km/h) |
| 55 mph (88.51 km/h) | 53.05 mph (85.37 km/h) |
| 60 mph (96.56 km/h) | 57.87 mph (93.13 km/h) |
| 65 mph (104.61 km/h) | 62.69 mph (100.89 km/h) |
| 70 mph (112.65 km/h) | 67.51 mph (108.65 km/h) |
| 75 mph (120.7 km/h) | 72.34 mph (116.41 km/h) |
| 80 mph (128.75 km/h) | 77.16 mph (124.17 km/h) |
| 85 mph (136.79 km/h) | 81.98 mph (131.93 km/h) |
| 90 mph (144.84 km/h) | 86.8 mph (139.7 km/h) |
| 95 mph (152.89 km/h) | 91.62 mph (147.46 km/h) |
| 100 mph (160.93 km/h) | 96.45 mph (155.22 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 | 1805 | 1944 | 2030 | 2123 | 2189 | 2262 | 2348 | 2467 | 2586 | 2718 | 2824 | 3016 | 3227 | 3393 | 3499 | 3558 | 3776 | 4080 | 4742 |
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