Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/55-18 | 200/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.8 (655.2) | 25.87 (657.2) | 0.08 (2) 0.3% |
| Width inches (mm) | 7.09 (180) | 7.87 (200) | 0.79 (20) 11.1% |
| Circum. inches (mm) | 81.04 (2058.37) | 81.29 (2064.65) | 0.25 (6.28) 0.3% |
| Sidewall Height inches (mm) | 3.9 (99) | 3.94 (100) | 0.04 (1) 1% |
| Revolutions per mile (km) | 781.85 (485.82) | 779.47 (484.34) | -2.38 (-1.48) -0.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.06 mph (32.29 km/h) |
| 25 mph (40.23 km/h) | 25.08 mph (40.36 km/h) |
| 30 mph (48.28 km/h) | 30.09 mph (48.43 km/h) |
| 35 mph (56.33 km/h) | 35.11 mph (56.5 km/h) |
| 40 mph (64.37 km/h) | 40.12 mph (64.57 km/h) |
| 45 mph (72.42 km/h) | 45.14 mph (72.64 km/h) |
| 50 mph (80.47 km/h) | 50.15 mph (80.71 km/h) |
| 55 mph (88.51 km/h) | 55.17 mph (88.78 km/h) |
| 60 mph (96.56 km/h) | 60.18 mph (96.86 km/h) |
| 65 mph (104.61 km/h) | 65.2 mph (104.93 km/h) |
| 70 mph (112.65 km/h) | 70.21 mph (113 km/h) |
| 75 mph (120.7 km/h) | 75.23 mph (121.07 km/h) |
| 80 mph (128.75 km/h) | 80.24 mph (129.14 km/h) |
| 85 mph (136.79 km/h) | 85.26 mph (137.21 km/h) |
| 90 mph (144.84 km/h) | 90.27 mph (145.28 km/h) |
| 95 mph (152.89 km/h) | 95.29 mph (153.35 km/h) |
| 100 mph (160.93 km/h) | 100.31 mph (161.43 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1984 | 2304 | 2482 | 2591 | 2710 | 2794 | 2887 | 2997 | 3148 | 3300 | 3469 | 3604 | 3849 | 4119 | 4330 | 4465 | 4541 | 4820 | 5208 | 6052 |
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