Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/45-18 | 275/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.81 (731.7) | 27.74 (704.7) | -1.06 (-27) -3.7% |
| Width inches (mm) | 12.01 (305) | 10.83 (275) | -1.18 (-30) -9.8% |
| Circum. inches (mm) | 90.5 (2298.7) | 87.16 (2213.88) | -3.34 (-84.82) -3.7% |
| Sidewall Height inches (mm) | 5.4 (137.25) | 4.87 (123.75) | -0.53 (-13.5) -9.8% |
| Revolutions per mile (km) | 700.11 (435.03) | 726.93 (451.69) | 26.82 (16.67) 3.8% |
275/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.26 mph (31 km/h) |
| 25 mph (40.23 km/h) | 24.08 mph (38.75 km/h) |
| 30 mph (48.28 km/h) | 28.89 mph (46.5 km/h) |
| 35 mph (56.33 km/h) | 33.71 mph (54.25 km/h) |
| 40 mph (64.37 km/h) | 38.52 mph (62 km/h) |
| 45 mph (72.42 km/h) | 43.34 mph (69.75 km/h) |
| 50 mph (80.47 km/h) | 48.15 mph (77.5 km/h) |
| 55 mph (88.51 km/h) | 52.97 mph (85.25 km/h) |
| 60 mph (96.56 km/h) | 57.79 mph (93 km/h) |
| 65 mph (104.61 km/h) | 62.6 mph (100.75 km/h) |
| 70 mph (112.65 km/h) | 67.42 mph (108.5 km/h) |
| 75 mph (120.7 km/h) | 72.23 mph (116.25 km/h) |
| 80 mph (128.75 km/h) | 77.05 mph (124 km/h) |
| 85 mph (136.79 km/h) | 81.86 mph (131.75 km/h) |
| 90 mph (144.84 km/h) | 86.68 mph (139.5 km/h) |
| 95 mph (152.89 km/h) | 91.49 mph (147.25 km/h) |
| 100 mph (160.93 km/h) | 96.31 mph (155 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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