Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/55-18 | 255/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.74 (704.7) | 29.04 (737.7) | 1.3 (33) 4.7% |
| Width inches (mm) | 8.86 (225) | 10.04 (255) | 1.18 (30) 13.3% |
| Circum. inches (mm) | 87.16 (2213.88) | 91.24 (2317.55) | 4.08 (103.67) 4.7% |
| Sidewall Height inches (mm) | 4.87 (123.75) | 5.52 (140.25) | 0.65 (16.5) 13.3% |
| Revolutions per mile (km) | 726.93 (451.69) | 694.42 (431.49) | -32.52 (-20.21) -4.5% |
255/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.94 mph (33.69 km/h) |
| 25 mph (40.23 km/h) | 26.17 mph (42.12 km/h) |
| 30 mph (48.28 km/h) | 31.4 mph (50.54 km/h) |
| 35 mph (56.33 km/h) | 36.64 mph (58.96 km/h) |
| 40 mph (64.37 km/h) | 41.87 mph (67.39 km/h) |
| 45 mph (72.42 km/h) | 47.11 mph (75.81 km/h) |
| 50 mph (80.47 km/h) | 52.34 mph (84.24 km/h) |
| 55 mph (88.51 km/h) | 57.58 mph (92.66 km/h) |
| 60 mph (96.56 km/h) | 62.81 mph (101.08 km/h) |
| 65 mph (104.61 km/h) | 68.04 mph (109.51 km/h) |
| 70 mph (112.65 km/h) | 73.28 mph (117.93 km/h) |
| 75 mph (120.7 km/h) | 78.51 mph (126.35 km/h) |
| 80 mph (128.75 km/h) | 83.75 mph (134.78 km/h) |
| 85 mph (136.79 km/h) | 88.98 mph (143.2 km/h) |
| 90 mph (144.84 km/h) | 94.21 mph (151.62 km/h) |
| 95 mph (152.89 km/h) | 99.45 mph (160.05 km/h) |
| 100 mph (160.93 km/h) | 104.68 mph (168.47 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1767 | 2053 | 2211 | 2309 | 2414 | 2489 | 2572 | 2670 | 2805 | 2940 | 3091 | 3211 | 3429 | 3670 | 3858 | 3978 | 4046 | 4294 | 4640 | 5392 |
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