Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/70-18 | 33/12.5-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.06 (814.2) | 33.02 (838.8) | 0.97 (24.6) 3% |
| Width inches (mm) | 10.04 (255) | 12.52 (318) | 2.48 (63) 24.7% |
| Circum. inches (mm) | 100.7 (2557.88) | 103.75 (2635.17) | 3.04 (77.28) 3% |
| Sidewall Height inches (mm) | 7.03 (178.5) | 7.51 (190.8) | 0.48 (12.3) 6.9% |
| Revolutions per mile (km) | 629.17 (390.95) | 610.72 (379.48) | -18.45 (-11.47) -2.9% |
33/12.5-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.6 mph (33.16 km/h) |
| 25 mph (40.23 km/h) | 25.76 mph (41.45 km/h) |
| 30 mph (48.28 km/h) | 30.91 mph (49.74 km/h) |
| 35 mph (56.33 km/h) | 36.06 mph (58.03 km/h) |
| 40 mph (64.37 km/h) | 41.21 mph (66.32 km/h) |
| 45 mph (72.42 km/h) | 46.36 mph (74.61 km/h) |
| 50 mph (80.47 km/h) | 51.51 mph (82.9 km/h) |
| 55 mph (88.51 km/h) | 56.66 mph (91.19 km/h) |
| 60 mph (96.56 km/h) | 61.81 mph (99.48 km/h) |
| 65 mph (104.61 km/h) | 66.96 mph (107.77 km/h) |
| 70 mph (112.65 km/h) | 72.11 mph (116.06 km/h) |
| 75 mph (120.7 km/h) | 77.27 mph (124.35 km/h) |
| 80 mph (128.75 km/h) | 82.42 mph (132.64 km/h) |
| 85 mph (136.79 km/h) | 87.57 mph (140.93 km/h) |
| 90 mph (144.84 km/h) | 92.72 mph (149.22 km/h) |
| 95 mph (152.89 km/h) | 97.87 mph (157.51 km/h) |
| 100 mph (160.93 km/h) | 103.02 mph (165.8 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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