Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 34/12.5-18 | 33/12.5-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.03 (864.24) | 33.02 (838.8) | -1 (-25.44) -2.9% |
| Width inches (mm) | 12.52 (318) | 12.52 (318) | 0 (0) 0% |
| Circum. inches (mm) | 106.89 (2715.09) | 103.75 (2635.17) | -3.15 (-79.92) -2.9% |
| Sidewall Height inches (mm) | 8.01 (203.52) | 7.51 (190.8) | -0.5 (-12.72) -6.2% |
| Revolutions per mile (km) | 592.74 (368.31) | 610.72 (379.48) | 17.98 (11.17) 3% |
33/12.5-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.41 mph (31.24 km/h) |
| 25 mph (40.23 km/h) | 24.26 mph (39.05 km/h) |
| 30 mph (48.28 km/h) | 29.12 mph (46.86 km/h) |
| 35 mph (56.33 km/h) | 33.97 mph (54.67 km/h) |
| 40 mph (64.37 km/h) | 38.82 mph (62.48 km/h) |
| 45 mph (72.42 km/h) | 43.68 mph (70.29 km/h) |
| 50 mph (80.47 km/h) | 48.53 mph (78.1 km/h) |
| 55 mph (88.51 km/h) | 53.38 mph (85.91 km/h) |
| 60 mph (96.56 km/h) | 58.23 mph (93.72 km/h) |
| 65 mph (104.61 km/h) | 63.09 mph (101.53 km/h) |
| 70 mph (112.65 km/h) | 67.94 mph (109.34 km/h) |
| 75 mph (120.7 km/h) | 72.79 mph (117.15 km/h) |
| 80 mph (128.75 km/h) | 77.65 mph (124.96 km/h) |
| 85 mph (136.79 km/h) | 82.5 mph (132.77 km/h) |
| 90 mph (144.84 km/h) | 87.35 mph (140.58 km/h) |
| 95 mph (152.89 km/h) | 92.2 mph (148.39 km/h) |
| 100 mph (160.93 km/h) | 97.06 mph (156.2 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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