Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/55-15 | 185/60-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.71 (551.5) | 23.74 (603) | 2.03 (51.5) 9.3% |
| Width inches (mm) | 6.1 (155) | 7.28 (185) | 1.18 (30) 19.4% |
| Circum. inches (mm) | 68.21 (1732.59) | 74.58 (1894.38) | 6.37 (161.79) 9.3% |
| Sidewall Height inches (mm) | 3.36 (85.25) | 4.37 (111) | 1.01 (25.75) 30.2% |
| Revolutions per mile (km) | 928.87 (577.17) | 849.54 (527.88) | -79.33 (-49.29) -8.5% |
185/60-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.87 mph (35.19 km/h) |
| 25 mph (40.23 km/h) | 27.33 mph (43.99 km/h) |
| 30 mph (48.28 km/h) | 32.8 mph (52.79 km/h) |
| 35 mph (56.33 km/h) | 38.27 mph (61.59 km/h) |
| 40 mph (64.37 km/h) | 43.74 mph (70.39 km/h) |
| 45 mph (72.42 km/h) | 49.2 mph (79.18 km/h) |
| 50 mph (80.47 km/h) | 54.67 mph (87.98 km/h) |
| 55 mph (88.51 km/h) | 60.14 mph (96.78 km/h) |
| 60 mph (96.56 km/h) | 65.6 mph (105.58 km/h) |
| 65 mph (104.61 km/h) | 71.07 mph (114.38 km/h) |
| 70 mph (112.65 km/h) | 76.54 mph (123.17 km/h) |
| 75 mph (120.7 km/h) | 82 mph (131.97 km/h) |
| 80 mph (128.75 km/h) | 87.47 mph (140.77 km/h) |
| 85 mph (136.79 km/h) | 92.94 mph (149.57 km/h) |
| 90 mph (144.84 km/h) | 98.4 mph (158.37 km/h) |
| 95 mph (152.89 km/h) | 103.87 mph (167.16 km/h) |
| 100 mph (160.93 km/h) | 109.34 mph (175.96 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2162 | 2511 | 2705 | 2824 | 2953 | 3045 | 3146 | 3266 | 3431 | 3597 | 3781 | 3928 | 4195 | 4489 | 4719 | 4867 | 4949 | 5253 | 5676 | 6596 |
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