Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 205/55-15 | 185/65-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.88 (606.5) | 24.47 (621.5) | 0.59 (15) 2.5% |
| Width inches (mm) | 8.07 (205) | 7.28 (185) | -0.79 (-20) -9.8% |
| Circum. inches (mm) | 75.01 (1905.38) | 76.87 (1952.5) | 1.86 (47.12) 2.5% |
| Sidewall Height inches (mm) | 4.44 (112.75) | 4.73 (120.25) | 0.3 (7.5) 6.7% |
| Revolutions per mile (km) | 844.63 (524.83) | 824.25 (512.16) | -20.39 (-12.67) -2.4% |
185/65-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.49 mph (32.98 km/h) |
| 25 mph (40.23 km/h) | 25.62 mph (41.23 km/h) |
| 30 mph (48.28 km/h) | 30.74 mph (49.47 km/h) |
| 35 mph (56.33 km/h) | 35.87 mph (57.72 km/h) |
| 40 mph (64.37 km/h) | 40.99 mph (65.97 km/h) |
| 45 mph (72.42 km/h) | 46.11 mph (74.21 km/h) |
| 50 mph (80.47 km/h) | 51.24 mph (82.46 km/h) |
| 55 mph (88.51 km/h) | 56.36 mph (90.7 km/h) |
| 60 mph (96.56 km/h) | 61.48 mph (98.95 km/h) |
| 65 mph (104.61 km/h) | 66.61 mph (107.19 km/h) |
| 70 mph (112.65 km/h) | 71.73 mph (115.44 km/h) |
| 75 mph (120.7 km/h) | 76.85 mph (123.69 km/h) |
| 80 mph (128.75 km/h) | 81.98 mph (131.93 km/h) |
| 85 mph (136.79 km/h) | 87.1 mph (140.18 km/h) |
| 90 mph (144.84 km/h) | 92.23 mph (148.42 km/h) |
| 95 mph (152.89 km/h) | 97.35 mph (156.67 km/h) |
| 100 mph (160.93 km/h) | 102.47 mph (164.91 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2098 | 2437 | 2624 | 2740 | 2865 | 2954 | 3053 | 3169 | 3329 | 3490 | 3668 | 3811 | 4070 | 4356 | 4579 | 4722 | 4802 | 5097 | 5507 | 6400 |
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