Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/50-19 | 255/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.83 (757.6) | 29.04 (737.7) | -0.78 (-19.9) -2.6% |
| Width inches (mm) | 10.83 (275) | 10.04 (255) | -0.79 (-20) -7.3% |
| Circum. inches (mm) | 93.7 (2380.07) | 91.24 (2317.55) | -2.46 (-62.52) -2.6% |
| Sidewall Height inches (mm) | 5.41 (137.5) | 5.52 (140.25) | 0.11 (2.75) 2% |
| Revolutions per mile (km) | 676.17 (420.15) | 694.42 (431.49) | 18.24 (11.33) 2.7% |
255/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.47 mph (31.34 km/h) |
| 25 mph (40.23 km/h) | 24.34 mph (39.18 km/h) |
| 30 mph (48.28 km/h) | 29.21 mph (47.01 km/h) |
| 35 mph (56.33 km/h) | 34.08 mph (54.85 km/h) |
| 40 mph (64.37 km/h) | 38.95 mph (62.68 km/h) |
| 45 mph (72.42 km/h) | 43.82 mph (70.52 km/h) |
| 50 mph (80.47 km/h) | 48.69 mph (78.35 km/h) |
| 55 mph (88.51 km/h) | 53.56 mph (86.19 km/h) |
| 60 mph (96.56 km/h) | 58.42 mph (94.02 km/h) |
| 65 mph (104.61 km/h) | 63.29 mph (101.86 km/h) |
| 70 mph (112.65 km/h) | 68.16 mph (109.7 km/h) |
| 75 mph (120.7 km/h) | 73.03 mph (117.53 km/h) |
| 80 mph (128.75 km/h) | 77.9 mph (125.37 km/h) |
| 85 mph (136.79 km/h) | 82.77 mph (133.2 km/h) |
| 90 mph (144.84 km/h) | 87.64 mph (141.04 km/h) |
| 95 mph (152.89 km/h) | 92.5 mph (148.87 km/h) |
| 100 mph (160.93 km/h) | 97.37 mph (156.71 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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