Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 260/65-18 | 33/12.5-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.31 (795.2) | 33.02 (838.8) | 1.72 (43.6) 5.5% |
| Width inches (mm) | 10.24 (260) | 12.52 (318) | 2.28 (58) 22.3% |
| Circum. inches (mm) | 98.35 (2498.19) | 103.75 (2635.17) | 5.39 (136.97) 5.5% |
| Sidewall Height inches (mm) | 6.65 (169) | 7.51 (190.8) | 0.86 (21.8) 12.9% |
| Revolutions per mile (km) | 644.2 (400.29) | 610.72 (379.48) | -33.49 (-20.81) -5.2% |
33/12.5-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.1 mph (33.95 km/h) |
| 25 mph (40.23 km/h) | 26.37 mph (42.44 km/h) |
| 30 mph (48.28 km/h) | 31.64 mph (50.93 km/h) |
| 35 mph (56.33 km/h) | 36.92 mph (59.42 km/h) |
| 40 mph (64.37 km/h) | 42.19 mph (67.9 km/h) |
| 45 mph (72.42 km/h) | 47.47 mph (76.39 km/h) |
| 50 mph (80.47 km/h) | 52.74 mph (84.88 km/h) |
| 55 mph (88.51 km/h) | 58.02 mph (93.37 km/h) |
| 60 mph (96.56 km/h) | 63.29 mph (101.86 km/h) |
| 65 mph (104.61 km/h) | 68.56 mph (110.34 km/h) |
| 70 mph (112.65 km/h) | 73.84 mph (118.83 km/h) |
| 75 mph (120.7 km/h) | 79.11 mph (127.32 km/h) |
| 80 mph (128.75 km/h) | 84.39 mph (135.81 km/h) |
| 85 mph (136.79 km/h) | 89.66 mph (144.29 km/h) |
| 90 mph (144.84 km/h) | 94.93 mph (152.78 km/h) |
| 95 mph (152.89 km/h) | 100.21 mph (161.27 km/h) |
| 100 mph (160.93 km/h) | 105.48 mph (169.76 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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