Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/40-18 | 275/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.66 (677.2) | 27.74 (704.7) | 1.08 (27.5) 4.1% |
| Width inches (mm) | 10.83 (275) | 10.83 (275) | 0 (0) 0% |
| Circum. inches (mm) | 83.76 (2127.49) | 87.16 (2213.88) | 3.4 (86.39) 4.1% |
| Sidewall Height inches (mm) | 4.33 (110) | 4.87 (123.75) | 0.54 (13.75) 12.5% |
| Revolutions per mile (km) | 756.45 (470.04) | 726.93 (451.69) | -29.52 (-18.34) -3.9% |
275/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.81 mph (33.49 km/h) |
| 25 mph (40.23 km/h) | 26.02 mph (41.87 km/h) |
| 30 mph (48.28 km/h) | 31.22 mph (50.24 km/h) |
| 35 mph (56.33 km/h) | 36.42 mph (58.61 km/h) |
| 40 mph (64.37 km/h) | 41.62 mph (66.99 km/h) |
| 45 mph (72.42 km/h) | 46.83 mph (75.36 km/h) |
| 50 mph (80.47 km/h) | 52.03 mph (83.74 km/h) |
| 55 mph (88.51 km/h) | 57.23 mph (92.11 km/h) |
| 60 mph (96.56 km/h) | 62.44 mph (100.48 km/h) |
| 65 mph (104.61 km/h) | 67.64 mph (108.86 km/h) |
| 70 mph (112.65 km/h) | 72.84 mph (117.23 km/h) |
| 75 mph (120.7 km/h) | 78.05 mph (125.6 km/h) |
| 80 mph (128.75 km/h) | 83.25 mph (133.98 km/h) |
| 85 mph (136.79 km/h) | 88.45 mph (142.35 km/h) |
| 90 mph (144.84 km/h) | 93.65 mph (150.72 km/h) |
| 95 mph (152.89 km/h) | 98.86 mph (159.1 km/h) |
| 100 mph (160.93 km/h) | 104.06 mph (167.47 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1850 | 2149 | 2314 | 2417 | 2527 | 2606 | 2692 | 2795 | 2936 | 3078 | 3235 | 3361 | 3590 | 3842 | 4038 | 4164 | 4235 | 4495 | 4857 | 5644 |
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