Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/40-18 | 275/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.03 (661.2) | 26.66 (677.2) | 0.63 (16) 2.4% |
| Width inches (mm) | 10.04 (255) | 10.83 (275) | 0.79 (20) 7.8% |
| Circum. inches (mm) | 81.78 (2077.22) | 83.76 (2127.49) | 1.98 (50.27) 2.4% |
| Sidewall Height inches (mm) | 4.02 (102) | 4.33 (110) | 0.31 (8) 7.8% |
| Revolutions per mile (km) | 774.76 (481.41) | 756.45 (470.04) | -18.3 (-11.37) -2.4% |
275/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.48 mph (32.97 km/h) |
| 25 mph (40.23 km/h) | 25.6 mph (41.21 km/h) |
| 30 mph (48.28 km/h) | 30.73 mph (49.45 km/h) |
| 35 mph (56.33 km/h) | 35.85 mph (57.69 km/h) |
| 40 mph (64.37 km/h) | 40.97 mph (65.93 km/h) |
| 45 mph (72.42 km/h) | 46.09 mph (74.17 km/h) |
| 50 mph (80.47 km/h) | 51.21 mph (82.41 km/h) |
| 55 mph (88.51 km/h) | 56.33 mph (90.66 km/h) |
| 60 mph (96.56 km/h) | 61.45 mph (98.9 km/h) |
| 65 mph (104.61 km/h) | 66.57 mph (107.14 km/h) |
| 70 mph (112.65 km/h) | 71.69 mph (115.38 km/h) |
| 75 mph (120.7 km/h) | 76.81 mph (123.62 km/h) |
| 80 mph (128.75 km/h) | 81.94 mph (131.86 km/h) |
| 85 mph (136.79 km/h) | 87.06 mph (140.1 km/h) |
| 90 mph (144.84 km/h) | 92.18 mph (148.35 km/h) |
| 95 mph (152.89 km/h) | 97.3 mph (156.59 km/h) |
| 100 mph (160.93 km/h) | 102.42 mph (164.83 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
