Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/70-15 | 185/55-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.44 (570) | 23.01 (584.5) | 0.57 (14.5) 2.5% |
| Width inches (mm) | 5.31 (135) | 7.28 (185) | 1.97 (50) 37% |
| Circum. inches (mm) | 70.5 (1790.71) | 72.29 (1836.26) | 1.79 (45.55) 2.5% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 4.01 (101.75) | 0.29 (7.25) 7.7% |
| Revolutions per mile (km) | 898.72 (558.44) | 876.42 (544.58) | -22.3 (-13.85) -2.5% |
185/55-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.51 mph (33.01 km/h) |
| 25 mph (40.23 km/h) | 25.64 mph (41.26 km/h) |
| 30 mph (48.28 km/h) | 30.76 mph (49.51 km/h) |
| 35 mph (56.33 km/h) | 35.89 mph (57.76 km/h) |
| 40 mph (64.37 km/h) | 41.02 mph (66.01 km/h) |
| 45 mph (72.42 km/h) | 46.14 mph (74.26 km/h) |
| 50 mph (80.47 km/h) | 51.27 mph (82.51 km/h) |
| 55 mph (88.51 km/h) | 56.4 mph (90.77 km/h) |
| 60 mph (96.56 km/h) | 61.53 mph (99.02 km/h) |
| 65 mph (104.61 km/h) | 66.65 mph (107.27 km/h) |
| 70 mph (112.65 km/h) | 71.78 mph (115.52 km/h) |
| 75 mph (120.7 km/h) | 76.91 mph (123.77 km/h) |
| 80 mph (128.75 km/h) | 82.04 mph (132.02 km/h) |
| 85 mph (136.79 km/h) | 87.16 mph (140.27 km/h) |
| 90 mph (144.84 km/h) | 92.29 mph (148.53 km/h) |
| 95 mph (152.89 km/h) | 97.42 mph (156.78 km/h) |
| 100 mph (160.93 km/h) | 102.54 mph (165.03 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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