Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/45-18 | 255/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.81 (731.7) | 29.04 (737.7) | 0.24 (6) 0.8% |
| Width inches (mm) | 12.01 (305) | 10.04 (255) | -1.97 (-50) -16.4% |
| Circum. inches (mm) | 90.5 (2298.7) | 91.24 (2317.55) | 0.74 (18.85) 0.8% |
| Sidewall Height inches (mm) | 5.4 (137.25) | 5.52 (140.25) | 0.12 (3) 2.2% |
| Revolutions per mile (km) | 700.11 (435.03) | 694.42 (431.49) | -5.69 (-3.54) -0.8% |
255/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.16 mph (32.45 km/h) |
| 25 mph (40.23 km/h) | 25.21 mph (40.56 km/h) |
| 30 mph (48.28 km/h) | 30.25 mph (48.68 km/h) |
| 35 mph (56.33 km/h) | 35.29 mph (56.79 km/h) |
| 40 mph (64.37 km/h) | 40.33 mph (64.9 km/h) |
| 45 mph (72.42 km/h) | 45.37 mph (73.01 km/h) |
| 50 mph (80.47 km/h) | 50.41 mph (81.13 km/h) |
| 55 mph (88.51 km/h) | 55.45 mph (89.24 km/h) |
| 60 mph (96.56 km/h) | 60.49 mph (97.35 km/h) |
| 65 mph (104.61 km/h) | 65.53 mph (105.47 km/h) |
| 70 mph (112.65 km/h) | 70.57 mph (113.58 km/h) |
| 75 mph (120.7 km/h) | 75.62 mph (121.69 km/h) |
| 80 mph (128.75 km/h) | 80.66 mph (129.8 km/h) |
| 85 mph (136.79 km/h) | 85.7 mph (137.92 km/h) |
| 90 mph (144.84 km/h) | 90.74 mph (146.03 km/h) |
| 95 mph (152.89 km/h) | 95.78 mph (154.14 km/h) |
| 100 mph (160.93 km/h) | 100.82 mph (162.25 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1767 | 2053 | 2211 | 2309 | 2414 | 2489 | 2572 | 2670 | 2805 | 2940 | 3091 | 3211 | 3429 | 3670 | 3858 | 3978 | 4046 | 4294 | 4640 | 5392 |
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