Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/70-18 | 35/12.5-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 35.91 (912.2) | 35.03 (889.68) | -0.89 (-22.52) -2.5% |
| Width inches (mm) | 12.8 (325) | 12.52 (318) | -0.28 (-7) -2.2% |
| Circum. inches (mm) | 112.83 (2865.76) | 110.04 (2795.01) | -2.79 (-70.75) -2.5% |
| Sidewall Height inches (mm) | 8.96 (227.5) | 8.51 (216.24) | -0.44 (-11.26) -4.9% |
| Revolutions per mile (km) | 561.58 (348.95) | 575.79 (357.78) | 14.21 (8.83) 2.5% |
35/12.5-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.51 mph (31.39 km/h) |
| 25 mph (40.23 km/h) | 24.38 mph (39.24 km/h) |
| 30 mph (48.28 km/h) | 29.26 mph (47.09 km/h) |
| 35 mph (56.33 km/h) | 34.14 mph (54.94 km/h) |
| 40 mph (64.37 km/h) | 39.01 mph (62.78 km/h) |
| 45 mph (72.42 km/h) | 43.89 mph (70.63 km/h) |
| 50 mph (80.47 km/h) | 48.77 mph (78.48 km/h) |
| 55 mph (88.51 km/h) | 53.64 mph (86.33 km/h) |
| 60 mph (96.56 km/h) | 58.52 mph (94.18 km/h) |
| 65 mph (104.61 km/h) | 63.4 mph (102.03 km/h) |
| 70 mph (112.65 km/h) | 68.27 mph (109.87 km/h) |
| 75 mph (120.7 km/h) | 73.15 mph (117.72 km/h) |
| 80 mph (128.75 km/h) | 78.02 mph (125.57 km/h) |
| 85 mph (136.79 km/h) | 82.9 mph (133.42 km/h) |
| 90 mph (144.84 km/h) | 87.78 mph (141.27 km/h) |
| 95 mph (152.89 km/h) | 92.65 mph (149.11 km/h) |
| 100 mph (160.93 km/h) | 97.53 mph (156.96 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1465 | 1702 | 1833 | 1914 | 2002 | 2064 | 2132 | 2214 | 2326 | 2438 | 2563 | 2662 | 2843 | 3043 | 3199 | 3298 | 3355 | 3560 | 3847 | 4471 |
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