Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/25-23 | 320/85-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.2 (741.7) | 41.42 (1052) | 12.22 (310.3) 41.8% |
| Width inches (mm) | 12.4 (315) | 12.6 (320) | 0.2 (5) 1.6% |
| Circum. inches (mm) | 91.74 (2330.12) | 130.12 (3304.96) | 38.38 (974.84) 41.8% |
| Sidewall Height inches (mm) | 3.1 (78.75) | 10.71 (272) | 7.61 (193.25) 245.4% |
| Revolutions per mile (km) | 690.67 (429.16) | 486.95 (302.58) | -203.72 (-126.59) -29.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 28.37 mph (45.65 km/h) |
| 25 mph (40.23 km/h) | 35.46 mph (57.07 km/h) |
| 30 mph (48.28 km/h) | 42.55 mph (68.48 km/h) |
| 35 mph (56.33 km/h) | 49.64 mph (79.89 km/h) |
| 40 mph (64.37 km/h) | 56.73 mph (91.31 km/h) |
| 45 mph (72.42 km/h) | 63.83 mph (102.72 km/h) |
| 50 mph (80.47 km/h) | 70.92 mph (114.13 km/h) |
| 55 mph (88.51 km/h) | 78.01 mph (125.55 km/h) |
| 60 mph (96.56 km/h) | 85.1 mph (136.96 km/h) |
| 65 mph (104.61 km/h) | 92.19 mph (148.37 km/h) |
| 70 mph (112.65 km/h) | 99.29 mph (159.78 km/h) |
| 75 mph (120.7 km/h) | 106.38 mph (171.2 km/h) |
| 80 mph (128.75 km/h) | 113.47 mph (182.61 km/h) |
| 85 mph (136.79 km/h) | 120.56 mph (194.02 km/h) |
| 90 mph (144.84 km/h) | 127.65 mph (205.44 km/h) |
| 95 mph (152.89 km/h) | 134.74 mph (216.85 km/h) |
| 100 mph (160.93 km/h) | 141.84 mph (228.26 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1239 | 1440 | 1550 | 1619 | 1693 | 1745 | 1803 | 1872 | 1967 | 2062 | 2167 | 2252 | 2405 | 2573 | 2705 | 2789 | 2837 | 3011 | 3254 | 3781 |
Better Fuel Economy Factory Ratios Increased Power
