Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 25/7.5-15 | 315/50-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.08 (636.94) | 27.4 (696) | 2.33 (59.06) 9.3% |
| Width inches (mm) | 7.52 (191) | 12.4 (315) | 4.88 (124) 64.9% |
| Circum. inches (mm) | 78.78 (2001.01) | 86.08 (2186.55) | 7.3 (185.54) 9.3% |
| Sidewall Height inches (mm) | 5.04 (127.97) | 6.2 (157.5) | 1.16 (29.53) 23.1% |
| Revolutions per mile (km) | 804.27 (499.75) | 736.02 (457.34) | -68.25 (-42.41) -8.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.85 mph (35.17 km/h) |
| 25 mph (40.23 km/h) | 27.32 mph (43.96 km/h) |
| 30 mph (48.28 km/h) | 32.78 mph (52.76 km/h) |
| 35 mph (56.33 km/h) | 38.25 mph (61.55 km/h) |
| 40 mph (64.37 km/h) | 43.71 mph (70.34 km/h) |
| 45 mph (72.42 km/h) | 49.17 mph (79.14 km/h) |
| 50 mph (80.47 km/h) | 54.64 mph (87.93 km/h) |
| 55 mph (88.51 km/h) | 60.1 mph (96.72 km/h) |
| 60 mph (96.56 km/h) | 65.56 mph (105.51 km/h) |
| 65 mph (104.61 km/h) | 71.03 mph (114.31 km/h) |
| 70 mph (112.65 km/h) | 76.49 mph (123.1 km/h) |
| 75 mph (120.7 km/h) | 81.95 mph (131.89 km/h) |
| 80 mph (128.75 km/h) | 87.42 mph (140.69 km/h) |
| 85 mph (136.79 km/h) | 92.88 mph (149.48 km/h) |
| 90 mph (144.84 km/h) | 98.35 mph (158.27 km/h) |
| 95 mph (152.89 km/h) | 103.81 mph (167.06 km/h) |
| 100 mph (160.93 km/h) | 109.27 mph (175.86 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
