Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 335/25-20 | 315/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.59 (675.5) | 27.44 (697) | 0.85 (21.5) 3.2% |
| Width inches (mm) | 13.19 (335) | 12.4 (315) | -0.79 (-20) -6% |
| Circum. inches (mm) | 83.55 (2122.15) | 86.21 (2189.69) | 2.66 (67.54) 3.2% |
| Sidewall Height inches (mm) | 3.3 (83.75) | 3.72 (94.5) | 0.42 (10.75) 12.8% |
| Revolutions per mile (km) | 758.36 (471.22) | 734.96 (456.68) | -23.39 (-14.54) -3.1% |
315/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.64 mph (33.21 km/h) |
| 25 mph (40.23 km/h) | 25.8 mph (41.51 km/h) |
| 30 mph (48.28 km/h) | 30.95 mph (49.82 km/h) |
| 35 mph (56.33 km/h) | 36.11 mph (58.12 km/h) |
| 40 mph (64.37 km/h) | 41.27 mph (66.42 km/h) |
| 45 mph (72.42 km/h) | 46.43 mph (74.73 km/h) |
| 50 mph (80.47 km/h) | 51.59 mph (83.03 km/h) |
| 55 mph (88.51 km/h) | 56.75 mph (91.33 km/h) |
| 60 mph (96.56 km/h) | 61.91 mph (99.63 km/h) |
| 65 mph (104.61 km/h) | 67.07 mph (107.94 km/h) |
| 70 mph (112.65 km/h) | 72.23 mph (116.24 km/h) |
| 75 mph (120.7 km/h) | 77.39 mph (124.54 km/h) |
| 80 mph (128.75 km/h) | 82.55 mph (132.85 km/h) |
| 85 mph (136.79 km/h) | 87.71 mph (141.15 km/h) |
| 90 mph (144.84 km/h) | 92.86 mph (149.45 km/h) |
| 95 mph (152.89 km/h) | 98.02 mph (157.75 km/h) |
| 100 mph (160.93 km/h) | 103.18 mph (166.06 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1870 | 2173 | 2340 | 2443 | 2555 | 2634 | 2722 | 2825 | 2969 | 3112 | 3271 | 3398 | 3629 | 3884 | 4083 | 4210 | 4282 | 4545 | 4911 | 5707 |
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