Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/90-15 | 345/40-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.86 (606) | 27.87 (707.8) | 4.01 (101.8) 16.8% |
| Width inches (mm) | 4.92 (125) | 13.58 (345) | 8.66 (220) 176% |
| Circum. inches (mm) | 74.95 (1903.81) | 87.54 (2223.62) | 12.59 (319.81) 16.8% |
| Sidewall Height inches (mm) | 4.43 (112.5) | 5.43 (138) | 1 (25.5) 22.7% |
| Revolutions per mile (km) | 845.33 (525.26) | 723.75 (449.72) | -121.58 (-75.55) -14.4% |
345/40-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.36 mph (37.59 km/h) |
| 25 mph (40.23 km/h) | 29.2 mph (46.99 km/h) |
| 30 mph (48.28 km/h) | 35.04 mph (56.39 km/h) |
| 35 mph (56.33 km/h) | 40.88 mph (65.79 km/h) |
| 40 mph (64.37 km/h) | 46.72 mph (75.19 km/h) |
| 45 mph (72.42 km/h) | 52.56 mph (84.59 km/h) |
| 50 mph (80.47 km/h) | 58.4 mph (93.98 km/h) |
| 55 mph (88.51 km/h) | 64.24 mph (103.38 km/h) |
| 60 mph (96.56 km/h) | 70.08 mph (112.78 km/h) |
| 65 mph (104.61 km/h) | 75.92 mph (122.18 km/h) |
| 70 mph (112.65 km/h) | 81.76 mph (131.58 km/h) |
| 75 mph (120.7 km/h) | 87.6 mph (140.98 km/h) |
| 80 mph (128.75 km/h) | 93.44 mph (150.38 km/h) |
| 85 mph (136.79 km/h) | 99.28 mph (159.77 km/h) |
| 90 mph (144.84 km/h) | 105.12 mph (169.17 km/h) |
| 95 mph (152.89 km/h) | 110.96 mph (178.57 km/h) |
| 100 mph (160.93 km/h) | 116.8 mph (187.97 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1842 | 2140 | 2304 | 2406 | 2516 | 2594 | 2680 | 2782 | 2923 | 3064 | 3221 | 3347 | 3574 | 3825 | 4021 | 4146 | 4217 | 4475 | 4836 | 5619 |
Better Fuel Economy Factory Ratios Increased Power
