Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/35-18 | 275/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.3 (642.7) | 26.66 (677.2) | 1.36 (34.5) 5.4% |
| Width inches (mm) | 10.43 (265) | 10.83 (275) | 0.39 (10) 3.8% |
| Circum. inches (mm) | 79.49 (2019.1) | 83.76 (2127.49) | 4.27 (108.38) 5.4% |
| Sidewall Height inches (mm) | 3.65 (92.75) | 4.33 (110) | 0.68 (17.25) 18.6% |
| Revolutions per mile (km) | 797.06 (495.27) | 756.45 (470.04) | -40.61 (-25.23) -5.1% |
275/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.07 mph (33.91 km/h) |
| 25 mph (40.23 km/h) | 26.34 mph (42.39 km/h) |
| 30 mph (48.28 km/h) | 31.61 mph (50.87 km/h) |
| 35 mph (56.33 km/h) | 36.88 mph (59.35 km/h) |
| 40 mph (64.37 km/h) | 42.15 mph (67.83 km/h) |
| 45 mph (72.42 km/h) | 47.42 mph (76.31 km/h) |
| 50 mph (80.47 km/h) | 52.68 mph (84.79 km/h) |
| 55 mph (88.51 km/h) | 57.95 mph (93.27 km/h) |
| 60 mph (96.56 km/h) | 63.22 mph (101.74 km/h) |
| 65 mph (104.61 km/h) | 68.49 mph (110.22 km/h) |
| 70 mph (112.65 km/h) | 73.76 mph (118.7 km/h) |
| 75 mph (120.7 km/h) | 79.03 mph (127.18 km/h) |
| 80 mph (128.75 km/h) | 84.29 mph (135.66 km/h) |
| 85 mph (136.79 km/h) | 89.56 mph (144.14 km/h) |
| 90 mph (144.84 km/h) | 94.83 mph (152.62 km/h) |
| 95 mph (152.89 km/h) | 100.1 mph (161.09 km/h) |
| 100 mph (160.93 km/h) | 105.37 mph (169.57 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
