Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/45-18 | 275/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.04 (686.7) | 27.74 (704.7) | 0.71 (18) 2.6% |
| Width inches (mm) | 10.04 (255) | 10.83 (275) | 0.79 (20) 7.8% |
| Circum. inches (mm) | 84.93 (2157.33) | 87.16 (2213.88) | 2.23 (56.55) 2.6% |
| Sidewall Height inches (mm) | 4.52 (114.75) | 4.87 (123.75) | 0.35 (9) 7.8% |
| Revolutions per mile (km) | 745.99 (463.53) | 726.93 (451.69) | -19.05 (-11.84) -2.6% |
275/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.52 mph (33.03 km/h) |
| 25 mph (40.23 km/h) | 25.66 mph (41.29 km/h) |
| 30 mph (48.28 km/h) | 30.79 mph (49.55 km/h) |
| 35 mph (56.33 km/h) | 35.92 mph (57.8 km/h) |
| 40 mph (64.37 km/h) | 41.05 mph (66.06 km/h) |
| 45 mph (72.42 km/h) | 46.18 mph (74.32 km/h) |
| 50 mph (80.47 km/h) | 51.31 mph (82.58 km/h) |
| 55 mph (88.51 km/h) | 56.44 mph (90.83 km/h) |
| 60 mph (96.56 km/h) | 61.57 mph (99.09 km/h) |
| 65 mph (104.61 km/h) | 66.7 mph (107.35 km/h) |
| 70 mph (112.65 km/h) | 71.83 mph (115.61 km/h) |
| 75 mph (120.7 km/h) | 76.97 mph (123.86 km/h) |
| 80 mph (128.75 km/h) | 82.1 mph (132.12 km/h) |
| 85 mph (136.79 km/h) | 87.23 mph (140.38 km/h) |
| 90 mph (144.84 km/h) | 92.36 mph (148.64 km/h) |
| 95 mph (152.89 km/h) | 97.49 mph (156.9 km/h) |
| 100 mph (160.93 km/h) | 102.62 mph (165.15 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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