Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/70-15 | 175/90-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.92 (633) | 27.4 (696) | 2.48 (63) 10% |
| Width inches (mm) | 7.09 (180) | 6.89 (175) | -0.2 (-5) -2.8% |
| Circum. inches (mm) | 78.29 (1988.63) | 86.08 (2186.55) | 7.79 (197.92) 10% |
| Sidewall Height inches (mm) | 4.96 (126) | 6.2 (157.5) | 1.24 (31.5) 25% |
| Revolutions per mile (km) | 809.27 (502.86) | 736.02 (457.34) | -73.25 (-45.52) -9.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.99 mph (35.39 km/h) |
| 25 mph (40.23 km/h) | 27.49 mph (44.24 km/h) |
| 30 mph (48.28 km/h) | 32.99 mph (53.09 km/h) |
| 35 mph (56.33 km/h) | 38.48 mph (61.93 km/h) |
| 40 mph (64.37 km/h) | 43.98 mph (70.78 km/h) |
| 45 mph (72.42 km/h) | 49.48 mph (79.63 km/h) |
| 50 mph (80.47 km/h) | 54.98 mph (88.48 km/h) |
| 55 mph (88.51 km/h) | 60.47 mph (97.32 km/h) |
| 60 mph (96.56 km/h) | 65.97 mph (106.17 km/h) |
| 65 mph (104.61 km/h) | 71.47 mph (115.02 km/h) |
| 70 mph (112.65 km/h) | 76.97 mph (123.87 km/h) |
| 75 mph (120.7 km/h) | 82.46 mph (132.71 km/h) |
| 80 mph (128.75 km/h) | 87.96 mph (141.56 km/h) |
| 85 mph (136.79 km/h) | 93.46 mph (150.41 km/h) |
| 90 mph (144.84 km/h) | 98.96 mph (159.26 km/h) |
| 95 mph (152.89 km/h) | 104.45 mph (168.1 km/h) |
| 100 mph (160.93 km/h) | 109.95 mph (176.95 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
