Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 260/55-18 | 315/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.26 (743.2) | 30.4 (772.2) | 1.14 (29) 3.9% |
| Width inches (mm) | 10.24 (260) | 12.4 (315) | 2.17 (55) 21.2% |
| Circum. inches (mm) | 91.92 (2334.83) | 95.51 (2425.94) | 3.59 (91.11) 3.9% |
| Sidewall Height inches (mm) | 5.63 (143) | 6.2 (157.5) | 0.57 (14.5) 10.1% |
| Revolutions per mile (km) | 689.28 (428.3) | 663.39 (412.21) | -25.89 (-16.08) -3.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.78 mph (33.44 km/h) |
| 25 mph (40.23 km/h) | 25.98 mph (41.8 km/h) |
| 30 mph (48.28 km/h) | 31.17 mph (50.16 km/h) |
| 35 mph (56.33 km/h) | 36.37 mph (58.53 km/h) |
| 40 mph (64.37 km/h) | 41.56 mph (66.89 km/h) |
| 45 mph (72.42 km/h) | 46.76 mph (75.25 km/h) |
| 50 mph (80.47 km/h) | 51.95 mph (83.61 km/h) |
| 55 mph (88.51 km/h) | 57.15 mph (91.97 km/h) |
| 60 mph (96.56 km/h) | 62.34 mph (100.33 km/h) |
| 65 mph (104.61 km/h) | 67.54 mph (108.69 km/h) |
| 70 mph (112.65 km/h) | 72.73 mph (117.05 km/h) |
| 75 mph (120.7 km/h) | 77.93 mph (125.41 km/h) |
| 80 mph (128.75 km/h) | 83.12 mph (133.77 km/h) |
| 85 mph (136.79 km/h) | 88.32 mph (142.13 km/h) |
| 90 mph (144.84 km/h) | 93.51 mph (150.49 km/h) |
| 95 mph (152.89 km/h) | 98.71 mph (158.85 km/h) |
| 100 mph (160.93 km/h) | 103.9 mph (167.21 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1688 | 1961 | 2112 | 2205 | 2306 | 2378 | 2457 | 2550 | 2680 | 2809 | 2953 | 3067 | 3276 | 3506 | 3685 | 3800 | 3865 | 4102 | 4432 | 5151 |
Better Fuel Economy Factory Ratios Increased Power
