Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/45-18 | 255/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.1 (713.7) | 29.04 (737.7) | 0.94 (24) 3.4% |
| Width inches (mm) | 11.22 (285) | 10.04 (255) | -1.18 (-30) -10.5% |
| Circum. inches (mm) | 88.27 (2242.15) | 91.24 (2317.55) | 2.97 (75.4) 3.4% |
| Sidewall Height inches (mm) | 5.05 (128.25) | 5.52 (140.25) | 0.47 (12) 9.4% |
| Revolutions per mile (km) | 717.77 (446) | 694.42 (431.49) | -23.35 (-14.51) -3.3% |
255/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.67 mph (33.27 km/h) |
| 25 mph (40.23 km/h) | 25.84 mph (41.59 km/h) |
| 30 mph (48.28 km/h) | 31.01 mph (49.9 km/h) |
| 35 mph (56.33 km/h) | 36.18 mph (58.22 km/h) |
| 40 mph (64.37 km/h) | 41.35 mph (66.54 km/h) |
| 45 mph (72.42 km/h) | 46.51 mph (74.86 km/h) |
| 50 mph (80.47 km/h) | 51.68 mph (83.17 km/h) |
| 55 mph (88.51 km/h) | 56.85 mph (91.49 km/h) |
| 60 mph (96.56 km/h) | 62.02 mph (99.81 km/h) |
| 65 mph (104.61 km/h) | 67.19 mph (108.13 km/h) |
| 70 mph (112.65 km/h) | 72.35 mph (116.44 km/h) |
| 75 mph (120.7 km/h) | 77.52 mph (124.76 km/h) |
| 80 mph (128.75 km/h) | 82.69 mph (133.08 km/h) |
| 85 mph (136.79 km/h) | 87.86 mph (141.39 km/h) |
| 90 mph (144.84 km/h) | 93.03 mph (149.71 km/h) |
| 95 mph (152.89 km/h) | 98.19 mph (158.03 km/h) |
| 100 mph (160.93 km/h) | 103.36 mph (166.35 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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