Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/45-18 | 275/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.74 (704.7) | 26.66 (677.2) | -1.08 (-27.5) -3.9% |
| Width inches (mm) | 10.83 (275) | 10.83 (275) | 0 (0) 0% |
| Circum. inches (mm) | 87.16 (2213.88) | 83.76 (2127.49) | -3.4 (-86.39) -3.9% |
| Sidewall Height inches (mm) | 4.87 (123.75) | 4.33 (110) | -0.54 (-13.75) -11.1% |
| Revolutions per mile (km) | 726.93 (451.69) | 756.45 (470.04) | 29.52 (18.34) 4.1% |
275/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.22 mph (30.93 km/h) |
| 25 mph (40.23 km/h) | 24.02 mph (38.66 km/h) |
| 30 mph (48.28 km/h) | 28.83 mph (46.4 km/h) |
| 35 mph (56.33 km/h) | 33.63 mph (54.13 km/h) |
| 40 mph (64.37 km/h) | 38.44 mph (61.86 km/h) |
| 45 mph (72.42 km/h) | 43.24 mph (69.59 km/h) |
| 50 mph (80.47 km/h) | 48.05 mph (77.33 km/h) |
| 55 mph (88.51 km/h) | 52.85 mph (85.06 km/h) |
| 60 mph (96.56 km/h) | 57.66 mph (92.79 km/h) |
| 65 mph (104.61 km/h) | 62.46 mph (100.53 km/h) |
| 70 mph (112.65 km/h) | 67.27 mph (108.26 km/h) |
| 75 mph (120.7 km/h) | 72.07 mph (115.99 km/h) |
| 80 mph (128.75 km/h) | 76.88 mph (123.72 km/h) |
| 85 mph (136.79 km/h) | 81.68 mph (131.46 km/h) |
| 90 mph (144.84 km/h) | 86.49 mph (139.19 km/h) |
| 95 mph (152.89 km/h) | 91.29 mph (146.92 km/h) |
| 100 mph (160.93 km/h) | 96.1 mph (154.65 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 |
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