Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/35-17 | 275/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.58 (624.3) | 26.66 (677.2) | 2.08 (52.9) 8.5% |
| Width inches (mm) | 10.83 (275) | 10.83 (275) | 0 (0) 0% |
| Circum. inches (mm) | 77.22 (1961.3) | 83.76 (2127.49) | 6.54 (166.19) 8.5% |
| Sidewall Height inches (mm) | 3.79 (96.25) | 4.33 (110) | 0.54 (13.75) 14.3% |
| Revolutions per mile (km) | 820.55 (509.87) | 756.45 (470.04) | -64.1 (-39.83) -7.8% |
275/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.69 mph (34.91 km/h) |
| 25 mph (40.23 km/h) | 27.12 mph (43.64 km/h) |
| 30 mph (48.28 km/h) | 32.54 mph (52.37 km/h) |
| 35 mph (56.33 km/h) | 37.97 mph (61.1 km/h) |
| 40 mph (64.37 km/h) | 43.39 mph (69.83 km/h) |
| 45 mph (72.42 km/h) | 48.81 mph (78.56 km/h) |
| 50 mph (80.47 km/h) | 54.24 mph (87.29 km/h) |
| 55 mph (88.51 km/h) | 59.66 mph (96.01 km/h) |
| 60 mph (96.56 km/h) | 65.08 mph (104.74 km/h) |
| 65 mph (104.61 km/h) | 70.51 mph (113.47 km/h) |
| 70 mph (112.65 km/h) | 75.93 mph (122.2 km/h) |
| 75 mph (120.7 km/h) | 81.36 mph (130.93 km/h) |
| 80 mph (128.75 km/h) | 86.78 mph (139.66 km/h) |
| 85 mph (136.79 km/h) | 92.2 mph (148.39 km/h) |
| 90 mph (144.84 km/h) | 97.63 mph (157.11 km/h) |
| 95 mph (152.89 km/h) | 103.05 mph (165.84 km/h) |
| 100 mph (160.93 km/h) | 108.47 mph (174.57 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
