Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 115/70-15 | 315/50-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.34 (542) | 27.4 (696) | 6.06 (154) 28.4% |
| Width inches (mm) | 4.53 (115) | 12.4 (315) | 7.87 (200) 173.9% |
| Circum. inches (mm) | 67.04 (1702.74) | 86.08 (2186.55) | 19.05 (483.81) 28.4% |
| Sidewall Height inches (mm) | 3.17 (80.5) | 6.2 (157.5) | 3.03 (77) 95.7% |
| Revolutions per mile (km) | 945.15 (587.29) | 736.02 (457.34) | -209.13 (-129.95) -22.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 25.68 mph (41.33 km/h) |
| 25 mph (40.23 km/h) | 32.1 mph (51.67 km/h) |
| 30 mph (48.28 km/h) | 38.52 mph (62 km/h) |
| 35 mph (56.33 km/h) | 44.94 mph (72.33 km/h) |
| 40 mph (64.37 km/h) | 51.37 mph (82.66 km/h) |
| 45 mph (72.42 km/h) | 57.79 mph (93 km/h) |
| 50 mph (80.47 km/h) | 64.21 mph (103.33 km/h) |
| 55 mph (88.51 km/h) | 70.63 mph (113.66 km/h) |
| 60 mph (96.56 km/h) | 77.05 mph (124 km/h) |
| 65 mph (104.61 km/h) | 83.47 mph (134.33 km/h) |
| 70 mph (112.65 km/h) | 89.89 mph (144.66 km/h) |
| 75 mph (120.7 km/h) | 96.31 mph (155 km/h) |
| 80 mph (128.75 km/h) | 102.73 mph (165.33 km/h) |
| 85 mph (136.79 km/h) | 109.15 mph (175.66 km/h) |
| 90 mph (144.84 km/h) | 115.57 mph (186 km/h) |
| 95 mph (152.89 km/h) | 121.99 mph (196.33 km/h) |
| 100 mph (160.93 km/h) | 128.41 mph (206.66 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1873 | 2176 | 2343 | 2447 | 2558 | 2638 | 2726 | 2829 | 2973 | 3116 | 3276 | 3403 | 3634 | 3890 | 4089 | 4216 | 4288 | 4551 | 4918 | 5715 |
Better Fuel Economy Factory Ratios Increased Power
