Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/90-15 | 185/85-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.86 (606) | 27.38 (695.5) | 3.52 (89.5) 14.8% |
| Width inches (mm) | 4.92 (125) | 7.28 (185) | 2.36 (60) 48% |
| Circum. inches (mm) | 74.95 (1903.81) | 86.02 (2184.98) | 11.07 (281.17) 14.8% |
| Sidewall Height inches (mm) | 4.43 (112.5) | 6.19 (157.25) | 1.76 (44.75) 39.8% |
| Revolutions per mile (km) | 845.33 (525.26) | 736.55 (457.67) | -108.78 (-67.59) -12.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.95 mph (36.94 km/h) |
| 25 mph (40.23 km/h) | 28.69 mph (46.18 km/h) |
| 30 mph (48.28 km/h) | 34.43 mph (55.41 km/h) |
| 35 mph (56.33 km/h) | 40.17 mph (64.65 km/h) |
| 40 mph (64.37 km/h) | 45.91 mph (73.88 km/h) |
| 45 mph (72.42 km/h) | 51.65 mph (83.12 km/h) |
| 50 mph (80.47 km/h) | 57.38 mph (92.35 km/h) |
| 55 mph (88.51 km/h) | 63.12 mph (101.59 km/h) |
| 60 mph (96.56 km/h) | 68.86 mph (110.82 km/h) |
| 65 mph (104.61 km/h) | 74.6 mph (120.06 km/h) |
| 70 mph (112.65 km/h) | 80.34 mph (129.29 km/h) |
| 75 mph (120.7 km/h) | 86.08 mph (138.53 km/h) |
| 80 mph (128.75 km/h) | 91.82 mph (147.76 km/h) |
| 85 mph (136.79 km/h) | 97.55 mph (157 km/h) |
| 90 mph (144.84 km/h) | 103.29 mph (166.23 km/h) |
| 95 mph (152.89 km/h) | 109.03 mph (175.47 km/h) |
| 100 mph (160.93 km/h) | 114.77 mph (184.7 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1874 | 2177 | 2345 | 2449 | 2560 | 2640 | 2728 | 2832 | 2975 | 3119 | 3278 | 3406 | 3637 | 3892 | 4092 | 4219 | 4291 | 4554 | 4921 | 5719 |
Better Fuel Economy Factory Ratios Increased Power
