Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/40-18 | 205/70-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.09 (637.2) | 26.3 (668) | 1.21 (30.8) 4.8% |
| Width inches (mm) | 8.86 (225) | 8.07 (205) | -0.79 (-20) -8.9% |
| Circum. inches (mm) | 78.81 (2001.82) | 82.62 (2098.58) | 3.81 (96.76) 4.8% |
| Sidewall Height inches (mm) | 3.54 (90) | 5.65 (143.5) | 2.11 (53.5) 59.4% |
| Revolutions per mile (km) | 803.94 (499.54) | 766.87 (476.51) | -37.07 (-23.03) -4.6% |
205/70-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.97 mph (33.74 km/h) |
| 25 mph (40.23 km/h) | 26.21 mph (42.18 km/h) |
| 30 mph (48.28 km/h) | 31.45 mph (50.61 km/h) |
| 35 mph (56.33 km/h) | 36.69 mph (59.05 km/h) |
| 40 mph (64.37 km/h) | 41.93 mph (67.49 km/h) |
| 45 mph (72.42 km/h) | 47.18 mph (75.92 km/h) |
| 50 mph (80.47 km/h) | 52.42 mph (84.36 km/h) |
| 55 mph (88.51 km/h) | 57.66 mph (92.79 km/h) |
| 60 mph (96.56 km/h) | 62.9 mph (101.23 km/h) |
| 65 mph (104.61 km/h) | 68.14 mph (109.66 km/h) |
| 70 mph (112.65 km/h) | 73.38 mph (118.1 km/h) |
| 75 mph (120.7 km/h) | 78.63 mph (126.54 km/h) |
| 80 mph (128.75 km/h) | 83.87 mph (134.97 km/h) |
| 85 mph (136.79 km/h) | 89.11 mph (143.41 km/h) |
| 90 mph (144.84 km/h) | 94.35 mph (151.84 km/h) |
| 95 mph (152.89 km/h) | 99.59 mph (160.28 km/h) |
| 100 mph (160.93 km/h) | 104.83 mph (168.71 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1952 | 2267 | 2442 | 2549 | 2666 | 2749 | 2840 | 2948 | 3098 | 3247 | 3413 | 3546 | 3787 | 4053 | 4260 | 4393 | 4468 | 4742 | 5124 | 5954 |
Better Fuel Economy Factory Ratios Increased Power
