Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/35-20 | 315/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.68 (728.5) | 31.16 (791.5) | 2.48 (63) 8.6% |
| Width inches (mm) | 12.4 (315) | 12.4 (315) | 0 (0) 0% |
| Circum. inches (mm) | 90.1 (2288.65) | 97.9 (2486.57) | 7.79 (197.92) 8.6% |
| Sidewall Height inches (mm) | 4.34 (110.25) | 5.58 (141.75) | 1.24 (31.5) 28.6% |
| Revolutions per mile (km) | 703.18 (436.94) | 647.21 (402.16) | -55.97 (-34.78) -8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.73 mph (34.97 km/h) |
| 25 mph (40.23 km/h) | 27.16 mph (43.71 km/h) |
| 30 mph (48.28 km/h) | 32.59 mph (52.46 km/h) |
| 35 mph (56.33 km/h) | 38.03 mph (61.2 km/h) |
| 40 mph (64.37 km/h) | 43.46 mph (69.94 km/h) |
| 45 mph (72.42 km/h) | 48.89 mph (78.68 km/h) |
| 50 mph (80.47 km/h) | 54.32 mph (87.43 km/h) |
| 55 mph (88.51 km/h) | 59.76 mph (96.17 km/h) |
| 60 mph (96.56 km/h) | 65.19 mph (104.91 km/h) |
| 65 mph (104.61 km/h) | 70.62 mph (113.65 km/h) |
| 70 mph (112.65 km/h) | 76.05 mph (122.4 km/h) |
| 75 mph (120.7 km/h) | 81.49 mph (131.14 km/h) |
| 80 mph (128.75 km/h) | 86.92 mph (139.88 km/h) |
| 85 mph (136.79 km/h) | 92.35 mph (148.62 km/h) |
| 90 mph (144.84 km/h) | 97.78 mph (157.37 km/h) |
| 95 mph (152.89 km/h) | 103.22 mph (166.11 km/h) |
| 100 mph (160.93 km/h) | 108.65 mph (174.85 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1647 | 1913 | 2061 | 2152 | 2250 | 2320 | 2397 | 2488 | 2614 | 2740 | 2881 | 2993 | 3196 | 3420 | 3595 | 3708 | 3771 | 4002 | 4324 | 5025 |
Better Fuel Economy Factory Ratios Increased Power
