Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/65-18 | 35/12.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.63 (879.7) | 35.02 (889.6) | 0.39 (9.9) 1.1% |
| Width inches (mm) | 12.8 (325) | 12.52 (318) | -0.28 (-7) -2.2% |
| Circum. inches (mm) | 108.81 (2763.66) | 110.03 (2794.76) | 1.22 (31.1) 1.1% |
| Sidewall Height inches (mm) | 8.32 (211.25) | 7.51 (190.8) | -0.81 (-20.45) -9.7% |
| Revolutions per mile (km) | 582.32 (361.84) | 575.84 (357.81) | -6.48 (-4.03) -1.1% |
35/12.5-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.23 mph (32.55 km/h) |
| 25 mph (40.23 km/h) | 25.28 mph (40.69 km/h) |
| 30 mph (48.28 km/h) | 30.34 mph (48.82 km/h) |
| 35 mph (56.33 km/h) | 35.39 mph (56.96 km/h) |
| 40 mph (64.37 km/h) | 40.45 mph (65.1 km/h) |
| 45 mph (72.42 km/h) | 45.51 mph (73.24 km/h) |
| 50 mph (80.47 km/h) | 50.56 mph (81.37 km/h) |
| 55 mph (88.51 km/h) | 55.62 mph (89.51 km/h) |
| 60 mph (96.56 km/h) | 60.68 mph (97.65 km/h) |
| 65 mph (104.61 km/h) | 65.73 mph (105.78 km/h) |
| 70 mph (112.65 km/h) | 70.79 mph (113.92 km/h) |
| 75 mph (120.7 km/h) | 75.84 mph (122.06 km/h) |
| 80 mph (128.75 km/h) | 80.9 mph (130.2 km/h) |
| 85 mph (136.79 km/h) | 85.96 mph (138.33 km/h) |
| 90 mph (144.84 km/h) | 91.01 mph (146.47 km/h) |
| 95 mph (152.89 km/h) | 96.07 mph (154.61 km/h) |
| 100 mph (160.93 km/h) | 101.13 mph (162.75 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 | 2133 | 2214 | 2326 | 2438 | 2563 | 2663 | 2844 | 3043 | 3199 | 3299 | 3355 | 3561 | 3847 | 4471 |
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