Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/60-20 | 315/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.8 (706) | 31.16 (791.5) | 3.37 (85.5) 12.1% |
| Width inches (mm) | 6.5 (165) | 12.4 (315) | 5.91 (150) 90.9% |
| Circum. inches (mm) | 87.32 (2217.96) | 97.9 (2486.57) | 10.58 (268.61) 12.1% |
| Sidewall Height inches (mm) | 3.9 (99) | 5.58 (141.75) | 1.68 (42.75) 43.2% |
| Revolutions per mile (km) | 725.6 (450.86) | 647.21 (402.16) | -78.38 (-48.7) -10.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.42 mph (36.08 km/h) |
| 25 mph (40.23 km/h) | 28.03 mph (45.11 km/h) |
| 30 mph (48.28 km/h) | 33.63 mph (54.13 km/h) |
| 35 mph (56.33 km/h) | 39.24 mph (63.15 km/h) |
| 40 mph (64.37 km/h) | 44.84 mph (72.17 km/h) |
| 45 mph (72.42 km/h) | 50.45 mph (81.19 km/h) |
| 50 mph (80.47 km/h) | 56.06 mph (90.21 km/h) |
| 55 mph (88.51 km/h) | 61.66 mph (99.23 km/h) |
| 60 mph (96.56 km/h) | 67.27 mph (108.25 km/h) |
| 65 mph (104.61 km/h) | 72.87 mph (117.28 km/h) |
| 70 mph (112.65 km/h) | 78.48 mph (126.3 km/h) |
| 75 mph (120.7 km/h) | 84.08 mph (135.32 km/h) |
| 80 mph (128.75 km/h) | 89.69 mph (144.34 km/h) |
| 85 mph (136.79 km/h) | 95.29 mph (153.36 km/h) |
| 90 mph (144.84 km/h) | 100.9 mph (162.38 km/h) |
| 95 mph (152.89 km/h) | 106.5 mph (171.4 km/h) |
| 100 mph (160.93 km/h) | 112.11 mph (180.42 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
