Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/60-18 | 315/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.99 (787.2) | 35.36 (898.2) | 4.37 (111) 14.1% |
| Width inches (mm) | 10.83 (275) | 12.4 (315) | 1.57 (40) 14.5% |
| Circum. inches (mm) | 97.36 (2473.06) | 111.09 (2821.78) | 13.73 (348.72) 14.1% |
| Sidewall Height inches (mm) | 6.5 (165) | 8.68 (220.5) | 2.19 (55.5) 33.6% |
| Revolutions per mile (km) | 650.75 (404.36) | 570.33 (354.39) | -80.42 (-49.97) -12.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.82 mph (36.73 km/h) |
| 25 mph (40.23 km/h) | 28.53 mph (45.91 km/h) |
| 30 mph (48.28 km/h) | 34.23 mph (55.09 km/h) |
| 35 mph (56.33 km/h) | 39.94 mph (64.27 km/h) |
| 40 mph (64.37 km/h) | 45.64 mph (73.45 km/h) |
| 45 mph (72.42 km/h) | 51.35 mph (82.63 km/h) |
| 50 mph (80.47 km/h) | 57.05 mph (91.81 km/h) |
| 55 mph (88.51 km/h) | 62.76 mph (101 km/h) |
| 60 mph (96.56 km/h) | 68.46 mph (110.18 km/h) |
| 65 mph (104.61 km/h) | 74.17 mph (119.36 km/h) |
| 70 mph (112.65 km/h) | 79.87 mph (128.54 km/h) |
| 75 mph (120.7 km/h) | 85.58 mph (137.72 km/h) |
| 80 mph (128.75 km/h) | 91.28 mph (146.9 km/h) |
| 85 mph (136.79 km/h) | 96.99 mph (156.08 km/h) |
| 90 mph (144.84 km/h) | 102.69 mph (165.26 km/h) |
| 95 mph (152.89 km/h) | 108.4 mph (174.45 km/h) |
| 100 mph (160.93 km/h) | 114.1 mph (183.63 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1451 | 1686 | 1816 | 1896 | 1983 | 2044 | 2112 | 2193 | 2304 | 2415 | 2538 | 2637 | 2816 | 3014 | 3168 | 3267 | 3323 | 3527 | 3811 | 4428 |
Better Fuel Economy Factory Ratios Increased Power
