Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/55-15 | 185/55-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.71 (551.5) | 23.01 (584.5) | 1.3 (33) 6% |
| Width inches (mm) | 6.1 (155) | 7.28 (185) | 1.18 (30) 19.4% |
| Circum. inches (mm) | 68.21 (1732.59) | 72.29 (1836.26) | 4.08 (103.67) 6% |
| Sidewall Height inches (mm) | 3.36 (85.25) | 4.01 (101.75) | 0.65 (16.5) 19.4% |
| Revolutions per mile (km) | 928.87 (577.17) | 876.42 (544.58) | -52.44 (-32.59) -5.6% |
185/55-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.2 mph (34.11 km/h) |
| 25 mph (40.23 km/h) | 26.5 mph (42.64 km/h) |
| 30 mph (48.28 km/h) | 31.8 mph (51.17 km/h) |
| 35 mph (56.33 km/h) | 37.09 mph (59.7 km/h) |
| 40 mph (64.37 km/h) | 42.39 mph (68.23 km/h) |
| 45 mph (72.42 km/h) | 47.69 mph (76.75 km/h) |
| 50 mph (80.47 km/h) | 52.99 mph (85.28 km/h) |
| 55 mph (88.51 km/h) | 58.29 mph (93.81 km/h) |
| 60 mph (96.56 km/h) | 63.59 mph (102.34 km/h) |
| 65 mph (104.61 km/h) | 68.89 mph (110.87 km/h) |
| 70 mph (112.65 km/h) | 74.19 mph (119.4 km/h) |
| 75 mph (120.7 km/h) | 79.49 mph (127.92 km/h) |
| 80 mph (128.75 km/h) | 84.79 mph (136.45 km/h) |
| 85 mph (136.79 km/h) | 90.09 mph (144.98 km/h) |
| 90 mph (144.84 km/h) | 95.39 mph (153.51 km/h) |
| 95 mph (152.89 km/h) | 100.68 mph (162.04 km/h) |
| 100 mph (160.93 km/h) | 105.98 mph (170.56 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2230 | 2591 | 2790 | 2914 | 3047 | 3141 | 3246 | 3369 | 3540 | 3711 | 3901 | 4053 | 4328 | 4631 | 4869 | 5021 | 5106 | 5419 | 5856 | 6805 |
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