Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/60-15 | 310/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.35 (771) | 30.98 (787) | 0.63 (16) 2.1% |
| Width inches (mm) | 12.8 (325) | 12.2 (310) | -0.59 (-15) -4.6% |
| Circum. inches (mm) | 95.36 (2422.17) | 97.34 (2472.43) | 1.98 (50.27) 2.1% |
| Sidewall Height inches (mm) | 7.68 (195) | 5.49 (139.5) | -2.19 (-55.5) -28.5% |
| Revolutions per mile (km) | 664.42 (412.85) | 650.92 (404.46) | -13.51 (-8.39) -2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.42 mph (32.85 km/h) |
| 25 mph (40.23 km/h) | 25.52 mph (41.07 km/h) |
| 30 mph (48.28 km/h) | 30.62 mph (49.28 km/h) |
| 35 mph (56.33 km/h) | 35.73 mph (57.5 km/h) |
| 40 mph (64.37 km/h) | 40.83 mph (65.71 km/h) |
| 45 mph (72.42 km/h) | 45.93 mph (73.92 km/h) |
| 50 mph (80.47 km/h) | 51.04 mph (82.14 km/h) |
| 55 mph (88.51 km/h) | 56.14 mph (90.35 km/h) |
| 60 mph (96.56 km/h) | 61.25 mph (98.56 km/h) |
| 65 mph (104.61 km/h) | 66.35 mph (106.78 km/h) |
| 70 mph (112.65 km/h) | 71.45 mph (114.99 km/h) |
| 75 mph (120.7 km/h) | 76.56 mph (123.21 km/h) |
| 80 mph (128.75 km/h) | 81.66 mph (131.42 km/h) |
| 85 mph (136.79 km/h) | 86.76 mph (139.63 km/h) |
| 90 mph (144.84 km/h) | 91.87 mph (147.85 km/h) |
| 95 mph (152.89 km/h) | 96.97 mph (156.06 km/h) |
| 100 mph (160.93 km/h) | 102.08 mph (164.27 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1656 | 1924 | 2072 | 2164 | 2263 | 2333 | 2411 | 2502 | 2629 | 2756 | 2897 | 3010 | 3214 | 3440 | 3616 | 3729 | 3792 | 4025 | 4349 | 5054 |
Better Fuel Economy Factory Ratios Increased Power
