Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/45-15 | 185/55-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.56 (547.5) | 22.01 (559.1) | 0.46 (11.6) 2.1% |
| Width inches (mm) | 7.28 (185) | 7.28 (185) | 0 (0) 0% |
| Circum. inches (mm) | 67.72 (1720.02) | 69.15 (1756.46) | 1.43 (36.44) 2.1% |
| Sidewall Height inches (mm) | 3.28 (83.25) | 4.01 (101.75) | 0.73 (18.5) 22.2% |
| Revolutions per mile (km) | 935.65 (581.39) | 916.24 (569.32) | -19.41 (-12.06) -2.1% |
185/55-14 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.42 mph (32.87 km/h) |
| 25 mph (40.23 km/h) | 25.53 mph (41.09 km/h) |
| 30 mph (48.28 km/h) | 30.64 mph (49.3 km/h) |
| 35 mph (56.33 km/h) | 35.74 mph (57.52 km/h) |
| 40 mph (64.37 km/h) | 40.85 mph (65.74 km/h) |
| 45 mph (72.42 km/h) | 45.95 mph (73.96 km/h) |
| 50 mph (80.47 km/h) | 51.06 mph (82.17 km/h) |
| 55 mph (88.51 km/h) | 56.17 mph (90.39 km/h) |
| 60 mph (96.56 km/h) | 61.27 mph (98.61 km/h) |
| 65 mph (104.61 km/h) | 66.38 mph (106.82 km/h) |
| 70 mph (112.65 km/h) | 71.48 mph (115.04 km/h) |
| 75 mph (120.7 km/h) | 76.59 mph (123.26 km/h) |
| 80 mph (128.75 km/h) | 81.69 mph (131.48 km/h) |
| 85 mph (136.79 km/h) | 86.8 mph (139.69 km/h) |
| 90 mph (144.84 km/h) | 91.91 mph (147.91 km/h) |
| 95 mph (152.89 km/h) | 97.01 mph (156.13 km/h) |
| 100 mph (160.93 km/h) | 102.12 mph (164.34 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2332 | 2709 | 2917 | 3046 | 3185 | 3284 | 3393 | 3522 | 3701 | 3879 | 4078 | 4237 | 4524 | 4842 | 5090 | 5249 | 5338 | 5665 | 6122 | 7114 |
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