Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 37/12.5-18 | 33/12.5-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.03 (940.56) | 33.02 (838.8) | -4.01 (-101.76) -10.8% |
| Width inches (mm) | 12.52 (318) | 12.52 (318) | 0 (0) 0% |
| Circum. inches (mm) | 116.33 (2954.86) | 103.75 (2635.17) | -12.59 (-319.69) -10.8% |
| Sidewall Height inches (mm) | 9.51 (241.68) | 7.51 (190.8) | -2 (-50.88) -21.1% |
| Revolutions per mile (km) | 544.64 (338.43) | 610.72 (379.48) | 66.07 (41.06) 12.1% |
33/12.5-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.84 mph (28.7 km/h) |
| 25 mph (40.23 km/h) | 22.3 mph (35.88 km/h) |
| 30 mph (48.28 km/h) | 26.75 mph (43.06 km/h) |
| 35 mph (56.33 km/h) | 31.21 mph (50.23 km/h) |
| 40 mph (64.37 km/h) | 35.67 mph (57.41 km/h) |
| 45 mph (72.42 km/h) | 40.13 mph (64.59 km/h) |
| 50 mph (80.47 km/h) | 44.59 mph (71.76 km/h) |
| 55 mph (88.51 km/h) | 49.05 mph (78.94 km/h) |
| 60 mph (96.56 km/h) | 53.51 mph (86.11 km/h) |
| 65 mph (104.61 km/h) | 57.97 mph (93.29 km/h) |
| 70 mph (112.65 km/h) | 62.43 mph (100.47 km/h) |
| 75 mph (120.7 km/h) | 66.89 mph (107.64 km/h) |
| 80 mph (128.75 km/h) | 71.34 mph (114.82 km/h) |
| 85 mph (136.79 km/h) | 75.8 mph (121.99 km/h) |
| 90 mph (144.84 km/h) | 80.26 mph (129.17 km/h) |
| 95 mph (152.89 km/h) | 84.72 mph (136.35 km/h) |
| 100 mph (160.93 km/h) | 89.18 mph (143.52 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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