Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/90-17 | 275/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.57 (674.8) | 26.66 (677.2) | 0.09 (2.4) 0.4% |
| Width inches (mm) | 5.31 (135) | 10.83 (275) | 5.51 (140) 103.7% |
| Circum. inches (mm) | 83.46 (2119.95) | 83.76 (2127.49) | 0.3 (7.54) 0.4% |
| Sidewall Height inches (mm) | 4.78 (121.5) | 4.33 (110) | -0.45 (-11.5) -9.5% |
| Revolutions per mile (km) | 759.14 (471.71) | 756.45 (470.04) | -2.69 (-1.67) -0.4% |
275/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.07 mph (32.3 km/h) |
| 25 mph (40.23 km/h) | 25.09 mph (40.38 km/h) |
| 30 mph (48.28 km/h) | 30.11 mph (48.45 km/h) |
| 35 mph (56.33 km/h) | 35.12 mph (56.53 km/h) |
| 40 mph (64.37 km/h) | 40.14 mph (64.6 km/h) |
| 45 mph (72.42 km/h) | 45.16 mph (72.68 km/h) |
| 50 mph (80.47 km/h) | 50.18 mph (80.75 km/h) |
| 55 mph (88.51 km/h) | 55.2 mph (88.83 km/h) |
| 60 mph (96.56 km/h) | 60.21 mph (96.9 km/h) |
| 65 mph (104.61 km/h) | 65.23 mph (104.98 km/h) |
| 70 mph (112.65 km/h) | 70.25 mph (113.05 km/h) |
| 75 mph (120.7 km/h) | 75.27 mph (121.13 km/h) |
| 80 mph (128.75 km/h) | 80.28 mph (129.21 km/h) |
| 85 mph (136.79 km/h) | 85.3 mph (137.28 km/h) |
| 90 mph (144.84 km/h) | 90.32 mph (145.36 km/h) |
| 95 mph (152.89 km/h) | 95.34 mph (153.43 km/h) |
| 100 mph (160.93 km/h) | 100.36 mph (161.51 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1925 | 2236 | 2408 | 2515 | 2630 | 2711 | 2802 | 2908 | 3055 | 3203 | 3367 | 3498 | 3735 | 3998 | 4202 | 4333 | 4407 | 4677 | 5054 | 5873 |
Better Fuel Economy Factory Ratios Increased Power
