Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 295/30-20 | 315/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.97 (685) | 27.44 (697) | 0.47 (12) 1.8% |
| Width inches (mm) | 11.61 (295) | 12.4 (315) | 0.79 (20) 6.8% |
| Circum. inches (mm) | 84.72 (2151.99) | 86.21 (2189.69) | 1.48 (37.7) 1.8% |
| Sidewall Height inches (mm) | 3.48 (88.5) | 3.72 (94.5) | 0.24 (6) 6.8% |
| Revolutions per mile (km) | 747.84 (464.69) | 734.96 (456.68) | -12.88 (-8) -1.7% |
315/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.35 mph (32.75 km/h) |
| 25 mph (40.23 km/h) | 25.44 mph (40.94 km/h) |
| 30 mph (48.28 km/h) | 30.53 mph (49.13 km/h) |
| 35 mph (56.33 km/h) | 35.61 mph (57.31 km/h) |
| 40 mph (64.37 km/h) | 40.7 mph (65.5 km/h) |
| 45 mph (72.42 km/h) | 45.79 mph (73.69 km/h) |
| 50 mph (80.47 km/h) | 50.88 mph (81.88 km/h) |
| 55 mph (88.51 km/h) | 55.96 mph (90.06 km/h) |
| 60 mph (96.56 km/h) | 61.05 mph (98.25 km/h) |
| 65 mph (104.61 km/h) | 66.14 mph (106.44 km/h) |
| 70 mph (112.65 km/h) | 71.23 mph (114.63 km/h) |
| 75 mph (120.7 km/h) | 76.31 mph (122.82 km/h) |
| 80 mph (128.75 km/h) | 81.4 mph (131 km/h) |
| 85 mph (136.79 km/h) | 86.49 mph (139.19 km/h) |
| 90 mph (144.84 km/h) | 91.58 mph (147.38 km/h) |
| 95 mph (152.89 km/h) | 96.66 mph (155.57 km/h) |
| 100 mph (160.93 km/h) | 101.75 mph (163.75 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1870 | 2173 | 2340 | 2443 | 2555 | 2634 | 2722 | 2825 | 2969 | 3112 | 3271 | 3398 | 3629 | 3884 | 4083 | 4210 | 4282 | 4545 | 4911 | 5707 |
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