Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/40-18 | 335/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.24 (717.2) | 27.91 (709) | -0.32 (-8.2) -1.1% |
| Width inches (mm) | 12.8 (325) | 13.19 (335) | 0.39 (10) 3.1% |
| Circum. inches (mm) | 88.71 (2253.15) | 87.69 (2227.39) | -1.01 (-25.76) -1.1% |
| Sidewall Height inches (mm) | 5.12 (130) | 3.96 (100.5) | -1.16 (-29.5) -22.7% |
| Revolutions per mile (km) | 714.26 (443.82) | 722.52 (448.96) | 8.26 (5.13) 1.2% |
335/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.77 mph (31.82 km/h) |
| 25 mph (40.23 km/h) | 24.71 mph (39.77 km/h) |
| 30 mph (48.28 km/h) | 29.66 mph (47.73 km/h) |
| 35 mph (56.33 km/h) | 34.6 mph (55.68 km/h) |
| 40 mph (64.37 km/h) | 39.54 mph (63.64 km/h) |
| 45 mph (72.42 km/h) | 44.49 mph (71.59 km/h) |
| 50 mph (80.47 km/h) | 49.43 mph (79.55 km/h) |
| 55 mph (88.51 km/h) | 54.37 mph (87.5 km/h) |
| 60 mph (96.56 km/h) | 59.31 mph (95.46 km/h) |
| 65 mph (104.61 km/h) | 64.26 mph (103.41 km/h) |
| 70 mph (112.65 km/h) | 69.2 mph (111.37 km/h) |
| 75 mph (120.7 km/h) | 74.14 mph (119.32 km/h) |
| 80 mph (128.75 km/h) | 79.09 mph (127.28 km/h) |
| 85 mph (136.79 km/h) | 84.03 mph (135.23 km/h) |
| 90 mph (144.84 km/h) | 88.97 mph (143.19 km/h) |
| 95 mph (152.89 km/h) | 93.91 mph (151.14 km/h) |
| 100 mph (160.93 km/h) | 98.86 mph (159.09 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1839 | 2136 | 2300 | 2402 | 2512 | 2590 | 2676 | 2778 | 2918 | 3059 | 3216 | 3341 | 3568 | 3818 | 4014 | 4139 | 4209 | 4468 | 4828 | 5610 |
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