Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/70-15 | 190/90-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.92 (633) | 28.46 (723) | 3.54 (90) 14.2% |
| Width inches (mm) | 7.09 (180) | 7.48 (190) | 0.39 (10) 5.6% |
| Circum. inches (mm) | 78.29 (1988.63) | 89.42 (2271.37) | 11.13 (282.74) 14.2% |
| Sidewall Height inches (mm) | 4.96 (126) | 6.73 (171) | 1.77 (45) 35.7% |
| Revolutions per mile (km) | 809.27 (502.86) | 708.53 (440.26) | -100.74 (-62.6) -12.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.84 mph (36.76 km/h) |
| 25 mph (40.23 km/h) | 28.55 mph (45.95 km/h) |
| 30 mph (48.28 km/h) | 34.27 mph (55.14 km/h) |
| 35 mph (56.33 km/h) | 39.98 mph (64.34 km/h) |
| 40 mph (64.37 km/h) | 45.69 mph (73.53 km/h) |
| 45 mph (72.42 km/h) | 51.4 mph (82.72 km/h) |
| 50 mph (80.47 km/h) | 57.11 mph (91.91 km/h) |
| 55 mph (88.51 km/h) | 62.82 mph (101.1 km/h) |
| 60 mph (96.56 km/h) | 68.53 mph (110.29 km/h) |
| 65 mph (104.61 km/h) | 74.24 mph (119.48 km/h) |
| 70 mph (112.65 km/h) | 79.95 mph (128.67 km/h) |
| 75 mph (120.7 km/h) | 85.66 mph (137.86 km/h) |
| 80 mph (128.75 km/h) | 91.37 mph (147.05 km/h) |
| 85 mph (136.79 km/h) | 97.09 mph (156.24 km/h) |
| 90 mph (144.84 km/h) | 102.8 mph (165.43 km/h) |
| 95 mph (152.89 km/h) | 108.51 mph (174.63 km/h) |
| 100 mph (160.93 km/h) | 114.22 mph (183.82 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1803 | 2095 | 2256 | 2356 | 2463 | 2540 | 2624 | 2724 | 2862 | 3000 | 3153 | 3276 | 3499 | 3744 | 3936 | 4059 | 4128 | 4381 | 4734 | 5501 |
Better Fuel Economy Factory Ratios Increased Power
